---
_id: '8909'
abstract:
- lang: eng
text: Spin qubits are considered to be among the most promising candidates for building
a quantum processor. Group IV hole spin qubits have moved into the focus of interest
due to the ease of operation and compatibility with Si technology. In addition,
Ge offers the option for monolithic superconductor-semiconductor integration.
Here we demonstrate a hole spin qubit operating at fields below 10 mT, the critical
field of Al, by exploiting the large out-of-plane hole g-factors in planar Ge
and by encoding the qubit into the singlet-triplet states of a double quantum
dot. We observe electrically controlled X and Z-rotations with tunable frequencies
exceeding 100 MHz and dephasing times of 1μs which we extend beyond 15μs with
echo techniques. These results show that Ge hole singlet triplet qubits outperform
their electronic Si and GaAs based counterparts in speed and coherence, respectively.
In addition, they are on par with Ge single spin qubits, but can be operated at
much lower fields underlining their potential for on chip integration with superconducting
technologies.
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
acknowledgement: This research was supported by the Scientific Service Units of Institute
of Science and Technology (IST) Austria through resources provided by the Miba Machine
Shop and the nanofabrication facility, and was made possible with the support of
the NOMIS Foundation. This project has received funding from the European Union’s
Horizon 2020 research and innovation programme under Marie Sklodowska-Curie grant
agreements no. 844511 and no. 75441, and by the Austrian Science Fund FWF-P 30207
project. A.B. acknowledges support from the European Union Horizon 2020 FET project
microSPIRE, no. 766955. M. Botifoll and J.A. acknowledge funding from Generalitat
de Catalunya 2017 SGR 327. The Catalan Institute of Nanoscience and Nanotechnology
(ICN2) is supported by the Severo Ochoa programme from the Spanish Ministery of
Economy (MINECO) (grant no. SEV-2017-0706) and is funded by the Catalonian Research
Centre (CERCA) Programme, Generalitat de Catalunya. Part of the present work has
been performed within the framework of the Universitat Autónoma de Barcelona Materials
Science PhD programme. Part of the HAADF scanning transmission electron microscopy
was conducted in the Laboratorio de Microscopias Avanzadas at Instituto de Nanociencia
de Aragon, Universidad de Zaragoza. ICN2 acknowledge support from the Spanish Superior
Council of Scientific Research (CSIC) Research Platform on Quantum Technologies
PTI-001. M.B. acknowledges funding from the Catalan Agency for Management of University
and Research Grants (AGAUR) Generalitat de Catalunya formation of investigators
(FI) PhD grant.
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Daniel
full_name: Jirovec, Daniel
id: 4C473F58-F248-11E8-B48F-1D18A9856A87
last_name: Jirovec
orcid: 0000-0002-7197-4801
- first_name: Andrea C
full_name: Hofmann, Andrea C
id: 340F461A-F248-11E8-B48F-1D18A9856A87
last_name: Hofmann
- first_name: Andrea
full_name: Ballabio, Andrea
last_name: Ballabio
- first_name: Philipp M.
full_name: Mutter, Philipp M.
last_name: Mutter
- first_name: Giulio
full_name: Tavani, Giulio
last_name: Tavani
- first_name: Marc
full_name: Botifoll, Marc
last_name: Botifoll
- first_name: Alessandro
full_name: Crippa, Alessandro
id: 1F2B21A2-F6E7-11E9-9B82-F7DBE5697425
last_name: Crippa
orcid: 0000-0002-2968-611X
- first_name: Josip
full_name: Kukucka, Josip
id: 3F5D8856-F248-11E8-B48F-1D18A9856A87
last_name: Kukucka
- first_name: Oliver
full_name: Sagi, Oliver
id: 71616374-A8E9-11E9-A7CA-09ECE5697425
last_name: Sagi
- first_name: Frederico
full_name: Martins, Frederico
id: 38F80F9A-1CB8-11EA-BC76-B49B3DDC885E
last_name: Martins
orcid: 0000-0003-2668-2401
- first_name: Jaime
full_name: Saez Mollejo, Jaime
id: e0390f72-f6e0-11ea-865d-862393336714
last_name: Saez Mollejo
- first_name: Ivan
full_name: Prieto Gonzalez, Ivan
id: 2A307FE2-F248-11E8-B48F-1D18A9856A87
last_name: Prieto Gonzalez
orcid: 0000-0002-7370-5357
- first_name: Maksim
full_name: Borovkov, Maksim
id: 2ac7a0a2-3562-11eb-9256-fbd18ea55087
last_name: Borovkov
- first_name: Jordi
full_name: Arbiol, Jordi
last_name: Arbiol
- first_name: Daniel
full_name: Chrastina, Daniel
last_name: Chrastina
- first_name: Giovanni
full_name: Isella, Giovanni
last_name: Isella
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
citation:
ama: Jirovec D, Hofmann AC, Ballabio A, et al. A singlet triplet hole spin qubit
in planar Ge. Nature Materials. 2021;20(8):1106–1112. doi:10.1038/s41563-021-01022-2
apa: Jirovec, D., Hofmann, A. C., Ballabio, A., Mutter, P. M., Tavani, G., Botifoll,
M., … Katsaros, G. (2021). A singlet triplet hole spin qubit in planar Ge. Nature
Materials. Springer Nature. https://doi.org/10.1038/s41563-021-01022-2
chicago: Jirovec, Daniel, Andrea C Hofmann, Andrea Ballabio, Philipp M. Mutter,
Giulio Tavani, Marc Botifoll, Alessandro Crippa, et al. “A Singlet Triplet Hole
Spin Qubit in Planar Ge.” Nature Materials. Springer Nature, 2021. https://doi.org/10.1038/s41563-021-01022-2.
ieee: D. Jirovec et al., “A singlet triplet hole spin qubit in planar Ge,”
Nature Materials, vol. 20, no. 8. Springer Nature, pp. 1106–1112, 2021.
ista: Jirovec D, Hofmann AC, Ballabio A, Mutter PM, Tavani G, Botifoll M, Crippa
A, Kukucka J, Sagi O, Martins F, Saez Mollejo J, Prieto Gonzalez I, Borovkov M,
Arbiol J, Chrastina D, Isella G, Katsaros G. 2021. A singlet triplet hole spin
qubit in planar Ge. Nature Materials. 20(8), 1106–1112.
mla: Jirovec, Daniel, et al. “A Singlet Triplet Hole Spin Qubit in Planar Ge.” Nature
Materials, vol. 20, no. 8, Springer Nature, 2021, pp. 1106–1112, doi:10.1038/s41563-021-01022-2.
short: D. Jirovec, A.C. Hofmann, A. Ballabio, P.M. Mutter, G. Tavani, M. Botifoll,
A. Crippa, J. Kukucka, O. Sagi, F. Martins, J. Saez Mollejo, I. Prieto Gonzalez,
M. Borovkov, J. Arbiol, D. Chrastina, G. Isella, G. Katsaros, Nature Materials
20 (2021) 1106–1112.
date_created: 2020-12-02T10:50:47Z
date_published: 2021-08-01T00:00:00Z
date_updated: 2024-03-25T23:30:14Z
day: '01'
department:
- _id: GeKa
- _id: NanoFab
- _id: GradSch
doi: 10.1038/s41563-021-01022-2
ec_funded: 1
external_id:
arxiv:
- '2011.13755'
isi:
- '000657596400001'
intvolume: ' 20'
isi: 1
issue: '8'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/2011.13755
month: '08'
oa: 1
oa_version: Preprint
page: 1106–1112
project:
- _id: 26A151DA-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '844511'
name: Majorana bound states in Ge/SiGe heterostructures
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
- _id: 2641CE5E-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P30207
name: Hole spin orbit qubits in Ge quantum wells
- _id: 262116AA-B435-11E9-9278-68D0E5697425
name: Hybrid Semiconductor - Superconductor Quantum Devices
publication: Nature Materials
publication_identifier:
eissn:
- 1476-4660
issn:
- 1476-1122
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
link:
- description: News on IST Homepage
relation: press_release
url: https://ist.ac.at/en/news/quantum-computing-with-holes/
record:
- id: '9323'
relation: research_data
status: public
- id: '10058'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: A singlet triplet hole spin qubit in planar Ge
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 20
year: '2021'
...
---
_id: '9038'
abstract:
- lang: eng
text: 'Layered materials in which individual atomic layers are bonded by weak van
der Waals forces (vdW materials) constitute one of the most prominent platforms
for materials research. Particularly, polar vdW crystals, such as hexagonal boron
nitride (h-BN), alpha-molybdenum trioxide (α-MoO3) or alpha-vanadium pentoxide
(α-V2O5), have received significant attention in nano-optics, since they support
phonon polaritons (PhPs)―light coupled to lattice vibrations― with strong electromagnetic
confinement and low optical losses. Recently, correlative far- and near-field
studies of α-MoO3 have been demonstrated as an effective strategy to accurately
extract the permittivity of this material. Here, we use this accurately characterized
and low-loss polaritonic material to sense its local dielectric environment, namely
silica (SiO2), one of the most widespread substrates in nanotechnology. By studying
the propagation of PhPs on α-MoO3 flakes with different thicknesses laying on
SiO2 substrates via near-field microscopy (s-SNOM), we extract locally the infrared
permittivity of SiO2. Our work reveals PhPs nanoimaging as a versatile method
for the quantitative characterization of the local optical properties of dielectric
substrates, crucial for understanding and predicting the response of nanomaterials
and for the future scalability of integrated nanophotonic devices. '
acknowledgement: "P.A.-M. acknowledges financial support through JAE Intro program
from the Superior\r\nCouncil of Scientific Investigations and the Spanish Ministry
of Science and Innovation (grant number JAEINT_20_00589). G.Á.-P. and J.T.-G. acknowledge
financial support through the Severo Ochoa Program from the Government of the Principality
of Asturias (grant numbers PA-20-PF-BP19-053 and PA-18-PF-BP17-126, respectively).
J.M.-S. acknowledges financial support from the Ramón y Cajal Program of the Government
of Spain (RYC2018-026196-I) and the Spanish Ministry of Science and Innovation (State
Plan for Scientific and Technical Research and Innovation grant number PID2019-110308GA-I00).
P.A.-G. acknowledges support from the European Research Council under starting grant
no. 715496, 2DNANOPTICA and the Spanish Ministry of Science and Innovation (State
Plan for Scientific and Technical Research and Innovation grant number PID2019-111156GB-I00)."
article_number: '120'
article_processing_charge: No
article_type: original
author:
- first_name: Patricia
full_name: Aguilar-Merino, Patricia
last_name: Aguilar-Merino
- first_name: Gonzalo
full_name: Álvarez-Pérez, Gonzalo
last_name: Álvarez-Pérez
- first_name: Javier
full_name: Taboada-Gutiérrez, Javier
last_name: Taboada-Gutiérrez
- first_name: Jiahua
full_name: Duan, Jiahua
last_name: Duan
- first_name: Ivan
full_name: Prieto Gonzalez, Ivan
id: 2A307FE2-F248-11E8-B48F-1D18A9856A87
last_name: Prieto Gonzalez
orcid: 0000-0002-7370-5357
- first_name: Luis Manuel
full_name: Álvarez-Prado, Luis Manuel
last_name: Álvarez-Prado
- first_name: Alexey Y.
full_name: Nikitin, Alexey Y.
last_name: Nikitin
- first_name: Javier
full_name: Martín-Sánchez, Javier
last_name: Martín-Sánchez
- first_name: Pablo
full_name: Alonso-González, Pablo
last_name: Alonso-González
citation:
ama: Aguilar-Merino P, Álvarez-Pérez G, Taboada-Gutiérrez J, et al. Extracting the
infrared permittivity of SiO2 substrates locally by near-field imaging of phonon
polaritons in a van der Waals crystal. Nanomaterials. 2021;11(1). doi:10.3390/nano11010120
apa: Aguilar-Merino, P., Álvarez-Pérez, G., Taboada-Gutiérrez, J., Duan, J., Prieto
Gonzalez, I., Álvarez-Prado, L. M., … Alonso-González, P. (2021). Extracting the
infrared permittivity of SiO2 substrates locally by near-field imaging of phonon
polaritons in a van der Waals crystal. Nanomaterials. MDPI. https://doi.org/10.3390/nano11010120
chicago: Aguilar-Merino, Patricia, Gonzalo Álvarez-Pérez, Javier Taboada-Gutiérrez,
Jiahua Duan, Ivan Prieto Gonzalez, Luis Manuel Álvarez-Prado, Alexey Y. Nikitin,
Javier Martín-Sánchez, and Pablo Alonso-González. “Extracting the Infrared Permittivity
of SiO2 Substrates Locally by Near-Field Imaging of Phonon Polaritons in a van
Der Waals Crystal.” Nanomaterials. MDPI, 2021. https://doi.org/10.3390/nano11010120.
ieee: P. Aguilar-Merino et al., “Extracting the infrared permittivity of
SiO2 substrates locally by near-field imaging of phonon polaritons in a van der
Waals crystal,” Nanomaterials, vol. 11, no. 1. MDPI, 2021.
ista: Aguilar-Merino P, Álvarez-Pérez G, Taboada-Gutiérrez J, Duan J, Prieto Gonzalez
I, Álvarez-Prado LM, Nikitin AY, Martín-Sánchez J, Alonso-González P. 2021. Extracting
the infrared permittivity of SiO2 substrates locally by near-field imaging of
phonon polaritons in a van der Waals crystal. Nanomaterials. 11(1), 120.
mla: Aguilar-Merino, Patricia, et al. “Extracting the Infrared Permittivity of SiO2
Substrates Locally by Near-Field Imaging of Phonon Polaritons in a van Der Waals
Crystal.” Nanomaterials, vol. 11, no. 1, 120, MDPI, 2021, doi:10.3390/nano11010120.
short: P. Aguilar-Merino, G. Álvarez-Pérez, J. Taboada-Gutiérrez, J. Duan, I. Prieto
Gonzalez, L.M. Álvarez-Prado, A.Y. Nikitin, J. Martín-Sánchez, P. Alonso-González,
Nanomaterials 11 (2021).
date_created: 2021-01-24T23:01:09Z
date_published: 2021-01-07T00:00:00Z
date_updated: 2023-08-07T13:35:50Z
day: '07'
ddc:
- '620'
department:
- _id: NanoFab
doi: 10.3390/nano11010120
external_id:
isi:
- '000610636600001'
pmid:
- '33430225'
file:
- access_level: open_access
checksum: 1edc13eeda83df5cd9fff9504727b1f5
content_type: application/pdf
creator: dernst
date_created: 2021-01-25T08:02:32Z
date_updated: 2021-01-25T08:02:32Z
file_id: '9042'
file_name: 2020_Nanomaterials_Aguilar_Merino.pdf
file_size: 2730267
relation: main_file
success: 1
file_date_updated: 2021-01-25T08:02:32Z
has_accepted_license: '1'
intvolume: ' 11'
isi: 1
issue: '1'
language:
- iso: eng
month: '01'
oa: 1
oa_version: Published Version
pmid: 1
publication: Nanomaterials
publication_identifier:
eissn:
- '20794991'
publication_status: published
publisher: MDPI
quality_controlled: '1'
scopus_import: '1'
status: public
title: Extracting the infrared permittivity of SiO2 substrates locally by near-field
imaging of phonon polaritons in a van der Waals crystal
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 11
year: '2021'
...
---
_id: '9334'
abstract:
- lang: eng
text: 'Polaritons with directional in-plane propagation and ultralow losses in van
der Waals (vdW) crystals promise unprecedented manipulation of light at the nanoscale.
However, these polaritons present a crucial limitation: their directional propagation
is intrinsically determined by the crystal structure of the host material, imposing
forbidden directions of propagation. Here, we demonstrate that directional polaritons
(in-plane hyperbolic phonon polaritons) in a vdW crystal (α-phase molybdenum trioxide)
can be directed along forbidden directions by inducing an optical topological
transition, which emerges when the slab is placed on a substrate with a given
negative permittivity (4H–silicon carbide). By visualizing the transition in real
space, we observe exotic polaritonic states between mutually orthogonal hyperbolic
regimes, which unveil the topological origin of the transition: a gap opening
in the dispersion. This work provides insights into optical topological transitions
in vdW crystals, which introduce a route to direct light at the nanoscale.'
acknowledgement: 'G.Á.-P. and J.T.-G. acknowledge support through the Severo Ochoa
Program from the government of the Principality of Asturias (grant nos. PA20-PF-BP19-053
and PA-18-PF-BP17-126, respectively). K.V.V. and V.S.V. acknowledge the Ministry
of Science and Higher Education of the Russian Federation (no. 0714-2020-0002).
J. M.-S. acknowledges financial support through the Ramón y Cajal Program from the
government of Spain and FSE (RYC2018-026196-I). A.Y.N. acknowledges the Spanish
Ministry of Science, Innovation and Universities (national project no. MAT201788358-C3-3-R),
and the Basque Department of Education (PIBA-2020-1-0014). P.A.-G. acknowledges
support from the European Research Council under starting grant no. 715496, 2DNANOPTICA. '
article_number: eabf2690
article_processing_charge: No
article_type: original
author:
- first_name: J.
full_name: Duan, J.
last_name: Duan
- first_name: G.
full_name: Álvarez-Pérez, G.
last_name: Álvarez-Pérez
- first_name: K. V.
full_name: Voronin, K. V.
last_name: Voronin
- first_name: Ivan
full_name: Prieto Gonzalez, Ivan
id: 2A307FE2-F248-11E8-B48F-1D18A9856A87
last_name: Prieto Gonzalez
orcid: 0000-0002-7370-5357
- first_name: J.
full_name: Taboada-Gutiérrez, J.
last_name: Taboada-Gutiérrez
- first_name: V. S.
full_name: Volkov, V. S.
last_name: Volkov
- first_name: J.
full_name: Martín-Sánchez, J.
last_name: Martín-Sánchez
- first_name: A. Y.
full_name: Nikitin, A. Y.
last_name: Nikitin
- first_name: P.
full_name: Alonso-González, P.
last_name: Alonso-González
citation:
ama: Duan J, Álvarez-Pérez G, Voronin KV, et al. Enabling propagation of anisotropic
polaritons along forbidden directions via a topological transition. Science
Advances. 2021;7(14). doi:10.1126/sciadv.abf2690
apa: Duan, J., Álvarez-Pérez, G., Voronin, K. V., Prieto Gonzalez, I., Taboada-Gutiérrez,
J., Volkov, V. S., … Alonso-González, P. (2021). Enabling propagation of anisotropic
polaritons along forbidden directions via a topological transition. Science
Advances. AAAS. https://doi.org/10.1126/sciadv.abf2690
chicago: Duan, J., G. Álvarez-Pérez, K. V. Voronin, Ivan Prieto Gonzalez, J. Taboada-Gutiérrez,
V. S. Volkov, J. Martín-Sánchez, A. Y. Nikitin, and P. Alonso-González. “Enabling
Propagation of Anisotropic Polaritons along Forbidden Directions via a Topological
Transition.” Science Advances. AAAS, 2021. https://doi.org/10.1126/sciadv.abf2690.
ieee: J. Duan et al., “Enabling propagation of anisotropic polaritons along
forbidden directions via a topological transition,” Science Advances, vol.
7, no. 14. AAAS, 2021.
ista: Duan J, Álvarez-Pérez G, Voronin KV, Prieto Gonzalez I, Taboada-Gutiérrez
J, Volkov VS, Martín-Sánchez J, Nikitin AY, Alonso-González P. 2021. Enabling
propagation of anisotropic polaritons along forbidden directions via a topological
transition. Science Advances. 7(14), eabf2690.
mla: Duan, J., et al. “Enabling Propagation of Anisotropic Polaritons along Forbidden
Directions via a Topological Transition.” Science Advances, vol. 7, no.
14, eabf2690, AAAS, 2021, doi:10.1126/sciadv.abf2690.
short: J. Duan, G. Álvarez-Pérez, K.V. Voronin, I. Prieto Gonzalez, J. Taboada-Gutiérrez,
V.S. Volkov, J. Martín-Sánchez, A.Y. Nikitin, P. Alonso-González, Science Advances
7 (2021).
date_created: 2021-04-18T22:01:42Z
date_published: 2021-04-02T00:00:00Z
date_updated: 2023-08-08T13:11:31Z
day: '02'
ddc:
- '530'
department:
- _id: NanoFab
doi: 10.1126/sciadv.abf2690
external_id:
isi:
- '000636455600027'
pmid:
- '33811076'
file:
- access_level: open_access
checksum: 4b383d4a1d484a71bbc64ecf401bbdbb
content_type: application/pdf
creator: dernst
date_created: 2021-04-19T11:17:29Z
date_updated: 2021-04-19T11:17:29Z
file_id: '9343'
file_name: 2021_ScienceAdv_Duan.pdf
file_size: 717489
relation: main_file
success: 1
file_date_updated: 2021-04-19T11:17:29Z
has_accepted_license: '1'
intvolume: ' 7'
isi: 1
issue: '14'
language:
- iso: eng
license: https://creativecommons.org/licenses/by-nc/4.0/
month: '04'
oa: 1
oa_version: Published Version
pmid: 1
publication: Science Advances
publication_identifier:
eissn:
- '23752548'
publication_status: published
publisher: AAAS
quality_controlled: '1'
scopus_import: '1'
status: public
title: Enabling propagation of anisotropic polaritons along forbidden directions via
a topological transition
tmp:
image: /images/cc_by_nc.png
legal_code_url: https://creativecommons.org/licenses/by-nc/4.0/legalcode
name: Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
short: CC BY-NC (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 7
year: '2021'
...
---
_id: '10177'
abstract:
- lang: eng
text: Phonon polaritons (PhPs)—light coupled to lattice vibrations—with in-plane
hyperbolic dispersion exhibit ray-like propagation with large wave vectors and
enhanced density of optical states along certain directions on a surface. As such,
they have raised a surge of interest, promising unprecedented manipulation of
infrared light at the nanoscale in a planar circuitry. Here, we demonstrate focusing
of in-plane hyperbolic PhPs propagating along thin slabs of α-MoO3. To that end,
we developed metallic nanoantennas of convex geometries for both efficient launching
and focusing of the polaritons. The foci obtained exhibit enhanced near-field
confinement and absorption compared to foci produced by in-plane isotropic PhPs.
Foci sizes as small as λp/4.5 = λ0/50 were achieved (λp is the polariton wavelength
and λ0 is the photon wavelength). Focusing of in-plane hyperbolic polaritons introduces
a first and most basic building block developing planar polariton optics using
in-plane anisotropic van der Waals materials.
acknowledgement: J.M.-S. acknowledges financial support from the Ramón y Cajal Program
of the Government of Spain and FSE (RYC2018-026196-I) and the Spanish Ministry of
Science and Innovation (State Plan for Scientific and Technical Research and Innovation
grant number PID2019-110308GA-I00). P.A.-G. acknowledges support from the European
Research Council under starting grant no. 715496, 2DNANOPTICA, and the Spanish Ministry
of Science and Innovation (State Plan for Scientific and Technical Research and
Innovation grant number PID2019-111156GB-I00). J.T.-G. acknowledges support through
the Severo Ochoa Program from the Government of the Principality of Asturias (PA-18-PF-BP17-126).
G.A.-P. acknowledges support through the Severo Ochoa Program from the Government
of the Principality of Asturias (PA-20-PF-BP19-053). K.V.V. and V.S.V. acknowledge
the financial support from the Ministry of Science and Higher Education of the Russian
Federation (agreement no. 075-15-2021-606). A.Y.N. acknowledges the Spanish Ministry
of Science, Innovation, and Universities (national projects MAT2017-88358-C3-3-R
and PID2020-115221GB-C42) and the Basque Department of Education (PIBA-2020-1-0014).
R.H. acknowledges financial support from the Spanish Ministry of Science, Innovation,
and Universities (national project number RTI2018-094830-B-100 and project number
MDM-2016-0618 of the Marie de Maeztu Units of Excellence Program) and the Basque
Government (grant number IT1164-19).
article_number: abj0127
article_processing_charge: Yes
article_type: original
arxiv: 1
author:
- first_name: Javier
full_name: Martín-Sánchez, Javier
last_name: Martín-Sánchez
- first_name: Jiahua
full_name: Duan, Jiahua
last_name: Duan
- first_name: Javier
full_name: Taboada-Gutiérrez, Javier
last_name: Taboada-Gutiérrez
- first_name: Gonzalo
full_name: Álvarez-Pérez, Gonzalo
last_name: Álvarez-Pérez
- first_name: Kirill V.
full_name: Voronin, Kirill V.
last_name: Voronin
- first_name: Ivan
full_name: Prieto Gonzalez, Ivan
id: 2A307FE2-F248-11E8-B48F-1D18A9856A87
last_name: Prieto Gonzalez
orcid: 0000-0002-7370-5357
- first_name: Weiliang
full_name: Ma, Weiliang
last_name: Ma
- first_name: Qiaoliang
full_name: Bao, Qiaoliang
last_name: Bao
- first_name: Valentyn S.
full_name: Volkov, Valentyn S.
last_name: Volkov
- first_name: Rainer
full_name: Hillenbrand, Rainer
last_name: Hillenbrand
- first_name: Alexey Y.
full_name: Nikitin, Alexey Y.
last_name: Nikitin
- first_name: Pablo
full_name: Alonso-González, Pablo
last_name: Alonso-González
citation:
ama: Martín-Sánchez J, Duan J, Taboada-Gutiérrez J, et al. Focusing of in-plane
hyperbolic polaritons in van der Waals crystals with tailored infrared nanoantennas.
Science Advances. 2021;7(41). doi:10.1126/sciadv.abj0127
apa: Martín-Sánchez, J., Duan, J., Taboada-Gutiérrez, J., Álvarez-Pérez, G., Voronin,
K. V., Prieto Gonzalez, I., … Alonso-González, P. (2021). Focusing of in-plane
hyperbolic polaritons in van der Waals crystals with tailored infrared nanoantennas.
Science Advances. American Association for the Advancement of Science.
https://doi.org/10.1126/sciadv.abj0127
chicago: Martín-Sánchez, Javier, Jiahua Duan, Javier Taboada-Gutiérrez, Gonzalo
Álvarez-Pérez, Kirill V. Voronin, Ivan Prieto Gonzalez, Weiliang Ma, et al. “Focusing
of In-Plane Hyperbolic Polaritons in van Der Waals Crystals with Tailored Infrared
Nanoantennas.” Science Advances. American Association for the Advancement
of Science, 2021. https://doi.org/10.1126/sciadv.abj0127.
ieee: J. Martín-Sánchez et al., “Focusing of in-plane hyperbolic polaritons
in van der Waals crystals with tailored infrared nanoantennas,” Science Advances,
vol. 7, no. 41. American Association for the Advancement of Science, 2021.
ista: Martín-Sánchez J, Duan J, Taboada-Gutiérrez J, Álvarez-Pérez G, Voronin KV,
Prieto Gonzalez I, Ma W, Bao Q, Volkov VS, Hillenbrand R, Nikitin AY, Alonso-González
P. 2021. Focusing of in-plane hyperbolic polaritons in van der Waals crystals
with tailored infrared nanoantennas. Science Advances. 7(41), abj0127.
mla: Martín-Sánchez, Javier, et al. “Focusing of In-Plane Hyperbolic Polaritons
in van Der Waals Crystals with Tailored Infrared Nanoantennas.” Science Advances,
vol. 7, no. 41, abj0127, American Association for the Advancement of Science,
2021, doi:10.1126/sciadv.abj0127.
short: J. Martín-Sánchez, J. Duan, J. Taboada-Gutiérrez, G. Álvarez-Pérez, K.V.
Voronin, I. Prieto Gonzalez, W. Ma, Q. Bao, V.S. Volkov, R. Hillenbrand, A.Y.
Nikitin, P. Alonso-González, Science Advances 7 (2021).
date_created: 2021-10-24T22:01:33Z
date_published: 2021-10-08T00:00:00Z
date_updated: 2023-08-14T08:04:42Z
day: '08'
ddc:
- '530'
department:
- _id: NanoFab
doi: 10.1126/sciadv.abj0127
external_id:
arxiv:
- '2103.10852'
isi:
- '000704912700024'
file:
- access_level: open_access
checksum: 0a470ef6a47d2b8a96ede4c4d28cfacd
content_type: application/pdf
creator: cziletti
date_created: 2021-10-27T14:16:06Z
date_updated: 2021-10-27T14:16:06Z
file_id: '10189'
file_name: 2021_ScienceAdv_Martin-Sanchez.pdf
file_size: 2441163
relation: main_file
success: 1
file_date_updated: 2021-10-27T14:16:06Z
has_accepted_license: '1'
intvolume: ' 7'
isi: 1
issue: '41'
language:
- iso: eng
month: '10'
oa: 1
oa_version: Published Version
publication: Science Advances
publication_identifier:
eissn:
- '23752548'
publication_status: published
publisher: American Association for the Advancement of Science
quality_controlled: '1'
scopus_import: '1'
status: public
title: Focusing of in-plane hyperbolic polaritons in van der Waals crystals with tailored
infrared nanoantennas
tmp:
image: /images/cc_by_nc.png
legal_code_url: https://creativecommons.org/licenses/by-nc/4.0/legalcode
name: Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
short: CC BY-NC (4.0)
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 7
year: '2021'
...
---
_id: '10559'
abstract:
- lang: eng
text: Hole gases in planar germanium can have high mobilities in combination with
strong spin-orbit interaction and electrically tunable g factors, and are therefore
emerging as a promising platform for creating hybrid superconductor-semiconductor
devices. A key challenge towards hybrid Ge-based quantum technologies is the design
of high-quality interfaces and superconducting contacts that are robust against
magnetic fields. In this work, by combining the assets of aluminum, which provides
good contact to the Ge, and niobium, which has a significant superconducting gap,
we demonstrate highly transparent low-disordered JoFETs with relatively large
ICRN products that are capable of withstanding high magnetic fields. We furthermore
demonstrate the ability of phase-biasing individual JoFETs, opening up an avenue
to explore topological superconductivity in planar Ge. The persistence of superconductivity
in the reported hybrid devices beyond 1.8 T paves the way towards integrating
spin qubits and proximity-induced superconductivity on the same chip.
acknowledged_ssus:
- _id: NanoFab
- _id: M-Shop
acknowledgement: This research and related results were made possible with the support
of the NOMIS Foundation. This research was supported by the Scientific Service Units
of IST Austria through resources provided by the MIBA Machine Shop and the nanofabrication
facility, the European Union's Horizon 2020 research and innovation program under
the Marie Sklodowska-Curie Grant agreement No. 844511 Grant Agreement No. 862046.
ICN2 acknowledge funding from Generalitat de Catalunya 2017 SGR 327. ICN2 is supported
by the Severo Ochoa program from Spanish MINECO (Grant No. SEV-2017-0706) and is
funded by the CERCA Programme/Generalitat de Catalunya. Part of the present work
has been performed in the framework of Universitat Autnoma de Barcelona Materials
Science PhD program. The HAADF-STEM microscopy was conducted in the Laboratorio
de Microscopias Avanzadas at Instituto de Nanociencia de Aragon-Universidad de Zaragoza.
Authors acknowledge the LMA-INA for offering access to their instruments and expertise.
We acknowledge support from CSIC Research Platform on Quantum Technologies PTI-001.
This project has received funding from the European Union's Horizon 2020 research
and innovation programme under Grant Agreement No. 823717 ESTEEM3. M.B. acknowledges
support from SUR Generalitat de Catalunya and the EU Social Fund; project ref. 2020
FI 00103. G.S. and M.V. acknowledge support through a projectruimte grant associated
with the Netherlands Organization of Scientific Research (NWO). J.D. acknowledges
support through FRIPRO-project 274853, which is funded by the Research Council of
Norway.
article_number: L022005
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Kushagra
full_name: Aggarwal, Kushagra
id: b22ab905-3539-11eb-84c3-fc159dcd79cb
last_name: Aggarwal
orcid: 0000-0001-9985-9293
- first_name: Andrea C
full_name: Hofmann, Andrea C
id: 340F461A-F248-11E8-B48F-1D18A9856A87
last_name: Hofmann
- first_name: Daniel
full_name: Jirovec, Daniel
id: 4C473F58-F248-11E8-B48F-1D18A9856A87
last_name: Jirovec
orcid: 0000-0002-7197-4801
- first_name: Ivan
full_name: Prieto Gonzalez, Ivan
id: 2A307FE2-F248-11E8-B48F-1D18A9856A87
last_name: Prieto Gonzalez
orcid: 0000-0002-7370-5357
- first_name: Amir
full_name: Sammak, Amir
last_name: Sammak
- first_name: Marc
full_name: Botifoll, Marc
last_name: Botifoll
- first_name: Sara
full_name: Martí-Sánchez, Sara
last_name: Martí-Sánchez
- first_name: Menno
full_name: Veldhorst, Menno
last_name: Veldhorst
- first_name: Jordi
full_name: Arbiol, Jordi
last_name: Arbiol
- first_name: Giordano
full_name: Scappucci, Giordano
last_name: Scappucci
- first_name: Jeroen
full_name: Danon, Jeroen
last_name: Danon
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
citation:
ama: Aggarwal K, Hofmann AC, Jirovec D, et al. Enhancement of proximity-induced
superconductivity in a planar Ge hole gas. Physical Review Research. 2021;3(2).
doi:10.1103/physrevresearch.3.l022005
apa: Aggarwal, K., Hofmann, A. C., Jirovec, D., Prieto Gonzalez, I., Sammak, A.,
Botifoll, M., … Katsaros, G. (2021). Enhancement of proximity-induced superconductivity
in a planar Ge hole gas. Physical Review Research. American Physical Society.
https://doi.org/10.1103/physrevresearch.3.l022005
chicago: Aggarwal, Kushagra, Andrea C Hofmann, Daniel Jirovec, Ivan Prieto Gonzalez,
Amir Sammak, Marc Botifoll, Sara Martí-Sánchez, et al. “Enhancement of Proximity-Induced
Superconductivity in a Planar Ge Hole Gas.” Physical Review Research. American
Physical Society, 2021. https://doi.org/10.1103/physrevresearch.3.l022005.
ieee: K. Aggarwal et al., “Enhancement of proximity-induced superconductivity
in a planar Ge hole gas,” Physical Review Research, vol. 3, no. 2. American
Physical Society, 2021.
ista: Aggarwal K, Hofmann AC, Jirovec D, Prieto Gonzalez I, Sammak A, Botifoll M,
Martí-Sánchez S, Veldhorst M, Arbiol J, Scappucci G, Danon J, Katsaros G. 2021.
Enhancement of proximity-induced superconductivity in a planar Ge hole gas. Physical
Review Research. 3(2), L022005.
mla: Aggarwal, Kushagra, et al. “Enhancement of Proximity-Induced Superconductivity
in a Planar Ge Hole Gas.” Physical Review Research, vol. 3, no. 2, L022005,
American Physical Society, 2021, doi:10.1103/physrevresearch.3.l022005.
short: K. Aggarwal, A.C. Hofmann, D. Jirovec, I. Prieto Gonzalez, A. Sammak, M.
Botifoll, S. Martí-Sánchez, M. Veldhorst, J. Arbiol, G. Scappucci, J. Danon, G.
Katsaros, Physical Review Research 3 (2021).
date_created: 2021-12-16T18:50:57Z
date_published: 2021-04-15T00:00:00Z
date_updated: 2024-02-21T12:41:26Z
day: '15'
ddc:
- '620'
department:
- _id: GeKa
doi: 10.1103/physrevresearch.3.l022005
ec_funded: 1
external_id:
arxiv:
- '2012.00322'
file:
- access_level: open_access
checksum: 60a1bc9c9b616b1b155044bb8cfc6484
content_type: application/pdf
creator: cchlebak
date_created: 2021-12-17T08:12:37Z
date_updated: 2021-12-17T08:12:37Z
file_id: '10561'
file_name: 2021_PhysRevResearch_Aggarwal.pdf
file_size: 1917512
relation: main_file
success: 1
file_date_updated: 2021-12-17T08:12:37Z
has_accepted_license: '1'
intvolume: ' 3'
issue: '2'
keyword:
- general engineering
language:
- iso: eng
month: '04'
oa: 1
oa_version: Published Version
project:
- _id: 26A151DA-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '844511'
name: Majorana bound states in Ge/SiGe heterostructures
- _id: 237E5020-32DE-11EA-91FC-C7463DDC885E
call_identifier: H2020
grant_number: '862046'
name: TOPOLOGICALLY PROTECTED AND SCALABLE QUANTUM BITS
publication: Physical Review Research
publication_identifier:
issn:
- 2643-1564
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
related_material:
record:
- id: '8831'
relation: earlier_version
status: public
- id: '8834'
relation: research_data
status: public
scopus_import: '1'
status: public
title: Enhancement of proximity-induced superconductivity in a planar Ge hole gas
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9
volume: 3
year: '2021'
...
---
_id: '10866'
abstract:
- lang: eng
text: Recent discoveries have shown that, when two layers of van der Waals (vdW)
materials are superimposed with a relative twist angle between them, the electronic
properties of the coupled system can be dramatically altered. Here, we demonstrate
that a similar concept can be extended to the optics realm, particularly to propagating
phonon polaritons–hybrid light-matter interactions. To do this, we fabricate stacks
composed of two twisted slabs of a vdW crystal (α-MoO3) supporting anisotropic
phonon polaritons (PhPs), and image the propagation of the latter when launched
by localized sources. Our images reveal that, under a critical angle, the PhPs
isofrequency curve undergoes a topological transition, in which the propagation
of PhPs is strongly guided (canalization regime) along predetermined directions
without geometric spreading. These results demonstrate a new degree of freedom
(twist angle) for controlling the propagation of polaritons at the nanoscale with
potential for nanoimaging, (bio)-sensing, or heat management.
acknowledgement: "J.T.-G. and G.Á.-P. acknowledge support through the Severo Ochoa
Program from the\r\nGovernment of the Principality of Asturias (nos. PA-18-PF-BP17-126
and PA20-PF-BP19-053,\r\nrespectively). J. M-S acknowledges financial support through
the Ramón y Cajal Program from\r\nthe Government of Spain (RYC2018-026196-I). A.Y.N.
acknowledges the Spanish Ministry of\r\nScience, Innovation and Universities (national
project no. MAT201788358-C3-3-R). P.A.-G.\r\nacknowledges support from the European
Research Council under starting grant no. 715496,\r\n2DNANOPTICA."
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Jiahua
full_name: Duan, Jiahua
last_name: Duan
- first_name: Nathaniel
full_name: Capote-Robayna, Nathaniel
last_name: Capote-Robayna
- first_name: Javier
full_name: Taboada-Gutiérrez, Javier
last_name: Taboada-Gutiérrez
- first_name: Gonzalo
full_name: Álvarez-Pérez, Gonzalo
last_name: Álvarez-Pérez
- first_name: Ivan
full_name: Prieto Gonzalez, Ivan
id: 2A307FE2-F248-11E8-B48F-1D18A9856A87
last_name: Prieto Gonzalez
orcid: 0000-0002-7370-5357
- first_name: Javier
full_name: Martín-Sánchez, Javier
last_name: Martín-Sánchez
- first_name: Alexey Y.
full_name: Nikitin, Alexey Y.
last_name: Nikitin
- first_name: Pablo
full_name: Alonso-González, Pablo
last_name: Alonso-González
citation:
ama: 'Duan J, Capote-Robayna N, Taboada-Gutiérrez J, et al. Twisted nano-optics:
Manipulating light at the nanoscale with twisted phonon polaritonic slabs. Nano
Letters. 2020;20(7):5323-5329. doi:10.1021/acs.nanolett.0c01673'
apa: 'Duan, J., Capote-Robayna, N., Taboada-Gutiérrez, J., Álvarez-Pérez, G., Prieto
Gonzalez, I., Martín-Sánchez, J., … Alonso-González, P. (2020). Twisted nano-optics:
Manipulating light at the nanoscale with twisted phonon polaritonic slabs. Nano
Letters. American Chemical Society. https://doi.org/10.1021/acs.nanolett.0c01673'
chicago: 'Duan, Jiahua, Nathaniel Capote-Robayna, Javier Taboada-Gutiérrez, Gonzalo
Álvarez-Pérez, Ivan Prieto Gonzalez, Javier Martín-Sánchez, Alexey Y. Nikitin,
and Pablo Alonso-González. “Twisted Nano-Optics: Manipulating Light at the Nanoscale
with Twisted Phonon Polaritonic Slabs.” Nano Letters. American Chemical
Society, 2020. https://doi.org/10.1021/acs.nanolett.0c01673.'
ieee: 'J. Duan et al., “Twisted nano-optics: Manipulating light at the nanoscale
with twisted phonon polaritonic slabs,” Nano Letters, vol. 20, no. 7. American
Chemical Society, pp. 5323–5329, 2020.'
ista: 'Duan J, Capote-Robayna N, Taboada-Gutiérrez J, Álvarez-Pérez G, Prieto Gonzalez
I, Martín-Sánchez J, Nikitin AY, Alonso-González P. 2020. Twisted nano-optics:
Manipulating light at the nanoscale with twisted phonon polaritonic slabs. Nano
Letters. 20(7), 5323–5329.'
mla: 'Duan, Jiahua, et al. “Twisted Nano-Optics: Manipulating Light at the Nanoscale
with Twisted Phonon Polaritonic Slabs.” Nano Letters, vol. 20, no. 7, American
Chemical Society, 2020, pp. 5323–29, doi:10.1021/acs.nanolett.0c01673.'
short: J. Duan, N. Capote-Robayna, J. Taboada-Gutiérrez, G. Álvarez-Pérez, I. Prieto
Gonzalez, J. Martín-Sánchez, A.Y. Nikitin, P. Alonso-González, Nano Letters 20
(2020) 5323–5329.
date_created: 2022-03-18T11:37:38Z
date_published: 2020-07-01T00:00:00Z
date_updated: 2023-09-05T12:05:58Z
day: '01'
department:
- _id: NanoFab
doi: 10.1021/acs.nanolett.0c01673
external_id:
arxiv:
- '2004.14599'
isi:
- '000548893200082'
pmid:
- '32530634'
intvolume: ' 20'
isi: 1
issue: '7'
keyword:
- Mechanical Engineering
- Condensed Matter Physics
- General Materials Science
- General Chemistry
- Bioengineering
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/2004.14599
month: '07'
oa: 1
oa_version: Preprint
page: 5323-5329
pmid: 1
publication: Nano Letters
publication_identifier:
eissn:
- 1530-6992
issn:
- 1530-6984
publication_status: published
publisher: American Chemical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Twisted nano-optics: Manipulating light at the nanoscale with twisted phonon
polaritonic slabs'
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 20
year: '2020'
...
---
_id: '7792'
abstract:
- lang: eng
text: Phonon polaritons—light coupled to lattice vibrations—in polar van der Waals
crystals are promising candidates for controlling the flow of energy on the nanoscale
due to their strong field confinement, anisotropic propagation and ultra-long
lifetime in the picosecond range1,2,3,4,5. However, the lack of tunability of
their narrow and material-specific spectral range—the Reststrahlen band—severely
limits their technological implementation. Here, we demonstrate that intercalation
of Na atoms in the van der Waals semiconductor α-V2O5 enables a broad spectral
shift of Reststrahlen bands, and that the phonon polaritons excited show ultra-low
losses (lifetime of 4 ± 1 ps), similar to phonon polaritons in a non-intercalated
crystal (lifetime of 6 ± 1 ps). We expect our intercalation method to be applicable
to other van der Waals crystals, opening the door for the use of phonon polaritons
in broad spectral bands in the mid-infrared domain.
acknowledgement: J.T.-G. and G.Á.-P. acknowledge support through the Severo Ochoa
Program from the Government of the Principality of Asturias (nos. PA-18-PF-BP17-126
and PA-20-PF-BP19-053, respectively). J.M.-S. acknowledges finantial support from
the Clarín Programme from the Government of the Principality of Asturias and a Marie
Curie-COFUND grant (PA-18-ACB17-29) and the Ramón y Cajal Program from the Government
of Spain (RYC2018-026196-I). K.C., X.P.A.G., H.V. and M.H.B. acknowledge the Air
Force Office of Scientific Research (AFOSR) grant no. FA 9550-18-1-0030 for funding
support. I.E. acknowledges financial support from the Spanish Ministry of Economy
and Competitiveness (grant no. FIS2016-76617-P). A.Y.N. acknowledges the Spanish
Ministry of Science, Innovation and Universities (national project no. MAT2017-88358-C3-3-R)
and the Basque Government (grant no. IT1164-19). Q.B. acknowledges the support from
Australian Research Council (grant nos. FT150100450, IH150100006 and CE170100039).
R.H. acknowledges support from the Spanish Ministry of Economy, Industry, and Competitiveness
(national project RTI2018-094830-B-100 and the Project MDM-2016-0618 of the María
de Maeztu Units of Excellence Program) and the Basque Goverment (grant no. IT1164-19).
P.A.-G. acknowledges support from the European Research Council under starting grant
no. 715496, 2DNANOPTICA.
article_processing_charge: No
article_type: original
author:
- first_name: Javier
full_name: Taboada-Gutiérrez, Javier
last_name: Taboada-Gutiérrez
- first_name: Gonzalo
full_name: Álvarez-Pérez, Gonzalo
last_name: Álvarez-Pérez
- first_name: Jiahua
full_name: Duan, Jiahua
last_name: Duan
- first_name: Weiliang
full_name: Ma, Weiliang
last_name: Ma
- first_name: Kyle
full_name: Crowley, Kyle
last_name: Crowley
- first_name: Ivan
full_name: Prieto Gonzalez, Ivan
id: 2A307FE2-F248-11E8-B48F-1D18A9856A87
last_name: Prieto Gonzalez
orcid: 0000-0002-7370-5357
- first_name: Andrei
full_name: Bylinkin, Andrei
last_name: Bylinkin
- first_name: Marta
full_name: Autore, Marta
last_name: Autore
- first_name: Halyna
full_name: Volkova, Halyna
last_name: Volkova
- first_name: Kenta
full_name: Kimura, Kenta
last_name: Kimura
- first_name: Tsuyoshi
full_name: Kimura, Tsuyoshi
last_name: Kimura
- first_name: M. H.
full_name: Berger, M. H.
last_name: Berger
- first_name: Shaojuan
full_name: Li, Shaojuan
last_name: Li
- first_name: Qiaoliang
full_name: Bao, Qiaoliang
last_name: Bao
- first_name: Xuan P.A.
full_name: Gao, Xuan P.A.
last_name: Gao
- first_name: Ion
full_name: Errea, Ion
last_name: Errea
- first_name: Alexey Y.
full_name: Nikitin, Alexey Y.
last_name: Nikitin
- first_name: Rainer
full_name: Hillenbrand, Rainer
last_name: Hillenbrand
- first_name: Javier
full_name: Martín-Sánchez, Javier
last_name: Martín-Sánchez
- first_name: Pablo
full_name: Alonso-González, Pablo
last_name: Alonso-González
citation:
ama: Taboada-Gutiérrez J, Álvarez-Pérez G, Duan J, et al. Broad spectral tuning
of ultra-low-loss polaritons in a van der Waals crystal by intercalation. Nature
Materials. 2020;19:964–968. doi:10.1038/s41563-020-0665-0
apa: Taboada-Gutiérrez, J., Álvarez-Pérez, G., Duan, J., Ma, W., Crowley, K., Prieto
Gonzalez, I., … Alonso-González, P. (2020). Broad spectral tuning of ultra-low-loss
polaritons in a van der Waals crystal by intercalation. Nature Materials.
Springer Nature. https://doi.org/10.1038/s41563-020-0665-0
chicago: Taboada-Gutiérrez, Javier, Gonzalo Álvarez-Pérez, Jiahua Duan, Weiliang
Ma, Kyle Crowley, Ivan Prieto Gonzalez, Andrei Bylinkin, et al. “Broad Spectral
Tuning of Ultra-Low-Loss Polaritons in a van Der Waals Crystal by Intercalation.”
Nature Materials. Springer Nature, 2020. https://doi.org/10.1038/s41563-020-0665-0.
ieee: J. Taboada-Gutiérrez et al., “Broad spectral tuning of ultra-low-loss
polaritons in a van der Waals crystal by intercalation,” Nature Materials,
vol. 19. Springer Nature, pp. 964–968, 2020.
ista: Taboada-Gutiérrez J, Álvarez-Pérez G, Duan J, Ma W, Crowley K, Prieto Gonzalez
I, Bylinkin A, Autore M, Volkova H, Kimura K, Kimura T, Berger MH, Li S, Bao Q,
Gao XPA, Errea I, Nikitin AY, Hillenbrand R, Martín-Sánchez J, Alonso-González
P. 2020. Broad spectral tuning of ultra-low-loss polaritons in a van der Waals
crystal by intercalation. Nature Materials. 19, 964–968.
mla: Taboada-Gutiérrez, Javier, et al. “Broad Spectral Tuning of Ultra-Low-Loss
Polaritons in a van Der Waals Crystal by Intercalation.” Nature Materials,
vol. 19, Springer Nature, 2020, pp. 964–968, doi:10.1038/s41563-020-0665-0.
short: J. Taboada-Gutiérrez, G. Álvarez-Pérez, J. Duan, W. Ma, K. Crowley, I. Prieto
Gonzalez, A. Bylinkin, M. Autore, H. Volkova, K. Kimura, T. Kimura, M.H. Berger,
S. Li, Q. Bao, X.P.A. Gao, I. Errea, A.Y. Nikitin, R. Hillenbrand, J. Martín-Sánchez,
P. Alonso-González, Nature Materials 19 (2020) 964–968.
date_created: 2020-05-03T22:00:49Z
date_published: 2020-09-01T00:00:00Z
date_updated: 2023-08-21T06:18:20Z
day: '01'
department:
- _id: NanoFab
doi: 10.1038/s41563-020-0665-0
external_id:
isi:
- '000526218500004'
pmid:
- '32284598'
intvolume: ' 19'
isi: 1
language:
- iso: eng
month: '09'
oa_version: None
page: 964–968
pmid: 1
publication: Nature Materials
publication_identifier:
eissn:
- '14764660'
issn:
- '14761122'
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
scopus_import: '1'
status: public
title: Broad spectral tuning of ultra-low-loss polaritons in a van der Waals crystal
by intercalation
type: journal_article
user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8
volume: 19
year: '2020'
...
---
_id: '8831'
abstract:
- lang: eng
text: Holes in planar Ge have high mobilities, strong spin-orbit interaction and
electrically tunable g-factors, and are therefore emerging as a promising candidate
for hybrid superconductorsemiconductor devices. This is further motivated by the
observation of supercurrent transport in planar Ge Josephson Field effect transistors
(JoFETs). A key challenge towards hybrid germanium quantum technology is the design
of high quality interfaces and superconducting contacts that are robust against
magnetic fields. By combining the assets of Al, which has a long superconducting
coherence, and Nb, which has a significant superconducting gap, we form low-disordered
JoFETs with large ICRN products that are capable of withstanding high magnetic
fields. We furthermore demonstrate the ability of phase-biasing individual JoFETs
opening up an avenue to explore topological superconductivity in planar Ge. The
persistence of superconductivity in the reported hybrid devices beyond 1.8 T paves
the way towards integrating spin qubits and proximity-induced superconductivity
on the same chip.
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
acknowledgement: "This research and related results were made possible with the support
of the NOMIS Foundation. This research was supported by the Scientific Service Units
of IST Austria through resources provided by the MIBA Machine Shop and the nanofabrication
facility, the European Union’s Horizon 2020 research and innovation program under
the Marie Sklodowska-Curie grant agreement #844511 and the Grant Agreement #862046.
ICN2 acknowledge funding from Generalitat de Catalunya 2017 SGR 327. ICN2 is supported
by the Severo Ochoa\r\nprogram from Spanish MINECO (Grant No. SEV2017-0706) and
is funded by the CERCA Programme / Generalitat de Catalunya. Part of the present
work has been performed in the framework of Universitat Aut`onoma de Barcelona Materials
Science PhD program. The HAADF-STEM microscopy was conducted in the Laboratorio
de Microscopias Avanzadas at Instituto de Nanociencia de Aragon-Universidad de Zaragoza.
Authors acknowledge the LMA-INA for offering access to their instruments and expertise.
We acknowledge support from CSIC Research Platform on Quantum Technologies PTI-001.
This project has received funding from\r\nthe European Union’s Horizon 2020 research
and innovation programme under grant agreement No 823717 – ESTEEM3. M.B. acknowledges
support from SUR Generalitat de Catalunya and the EU Social Fund; project ref. 2020
FI 00103. GS and MV acknowledge support through a projectruimte grant associated
with the Netherlands Organization of Scientific Research (NWO)."
article_number: '2012.00322'
article_processing_charge: No
arxiv: 1
author:
- first_name: Kushagra
full_name: Aggarwal, Kushagra
id: b22ab905-3539-11eb-84c3-fc159dcd79cb
last_name: Aggarwal
orcid: 0000-0001-9985-9293
- first_name: Andrea C
full_name: Hofmann, Andrea C
id: 340F461A-F248-11E8-B48F-1D18A9856A87
last_name: Hofmann
- first_name: Daniel
full_name: Jirovec, Daniel
id: 4C473F58-F248-11E8-B48F-1D18A9856A87
last_name: Jirovec
orcid: 0000-0002-7197-4801
- first_name: Ivan
full_name: Prieto Gonzalez, Ivan
id: 2A307FE2-F248-11E8-B48F-1D18A9856A87
last_name: Prieto Gonzalez
orcid: 0000-0002-7370-5357
- first_name: Amir
full_name: Sammak, Amir
last_name: Sammak
- first_name: Marc
full_name: Botifoll, Marc
last_name: Botifoll
- first_name: Sara
full_name: Marti-Sanchez, Sara
last_name: Marti-Sanchez
- first_name: Menno
full_name: Veldhorst, Menno
last_name: Veldhorst
- first_name: Jordi
full_name: Arbiol, Jordi
last_name: Arbiol
- first_name: Giordano
full_name: Scappucci, Giordano
last_name: Scappucci
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
citation:
ama: Aggarwal K, Hofmann AC, Jirovec D, et al. Enhancement of proximity induced
superconductivity in planar Germanium. arXiv.
apa: Aggarwal, K., Hofmann, A. C., Jirovec, D., Prieto Gonzalez, I., Sammak, A.,
Botifoll, M., … Katsaros, G. (n.d.). Enhancement of proximity induced superconductivity
in planar Germanium. arXiv.
chicago: Aggarwal, Kushagra, Andrea C Hofmann, Daniel Jirovec, Ivan Prieto Gonzalez,
Amir Sammak, Marc Botifoll, Sara Marti-Sanchez, et al. “Enhancement of Proximity
Induced Superconductivity in Planar Germanium.” ArXiv, n.d.
ieee: K. Aggarwal et al., “Enhancement of proximity induced superconductivity
in planar Germanium,” arXiv. .
ista: Aggarwal K, Hofmann AC, Jirovec D, Prieto Gonzalez I, Sammak A, Botifoll M,
Marti-Sanchez S, Veldhorst M, Arbiol J, Scappucci G, Katsaros G. Enhancement of
proximity induced superconductivity in planar Germanium. arXiv, 2012.00322.
mla: Aggarwal, Kushagra, et al. “Enhancement of Proximity Induced Superconductivity
in Planar Germanium.” ArXiv, 2012.00322.
short: K. Aggarwal, A.C. Hofmann, D. Jirovec, I. Prieto Gonzalez, A. Sammak, M.
Botifoll, S. Marti-Sanchez, M. Veldhorst, J. Arbiol, G. Scappucci, G. Katsaros,
ArXiv (n.d.).
date_created: 2020-12-02T10:42:53Z
date_published: 2020-12-02T00:00:00Z
date_updated: 2024-03-25T23:30:14Z
day: '02'
ddc:
- '530'
department:
- _id: GeKa
ec_funded: 1
external_id:
arxiv:
- '2012.00322'
file:
- access_level: open_access
checksum: 22a612e206232fa94b138b2c2f957582
content_type: application/pdf
creator: gkatsaro
date_created: 2020-12-02T10:42:31Z
date_updated: 2020-12-02T10:42:31Z
file_id: '8832'
file_name: Superconducting_2D_Ge.pdf
file_size: 1697939
relation: main_file
file_date_updated: 2020-12-02T10:42:31Z
has_accepted_license: '1'
language:
- iso: eng
month: '12'
oa: 1
oa_version: Submitted Version
project:
- _id: 262116AA-B435-11E9-9278-68D0E5697425
name: Hybrid Semiconductor - Superconductor Quantum Devices
- _id: 26A151DA-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '844511'
name: Majorana bound states in Ge/SiGe heterostructures
- _id: 237E5020-32DE-11EA-91FC-C7463DDC885E
call_identifier: H2020
grant_number: '862046'
name: TOPOLOGICALLY PROTECTED AND SCALABLE QUANTUM BITS
publication: arXiv
publication_status: submitted
related_material:
record:
- id: '10559'
relation: later_version
status: public
- id: '8834'
relation: research_data
status: public
- id: '10058'
relation: dissertation_contains
status: public
status: public
title: Enhancement of proximity induced superconductivity in planar Germanium
type: preprint
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2020'
...
---
_id: '10065'
abstract:
- lang: eng
text: We study double quantum dots in a Ge/SiGe heterostructure and test their maturity
towards singlet-triplet ($S-T_0$) qubits. We demonstrate a large range of tunability,
from two single quantum dots to a double quantum dot. We measure Pauli spin blockade
and study the anisotropy of the $g$-factor. We use an adjacent quantum dot for
sensing charge transitions in the double quantum dot at interest. In conclusion,
Ge/SiGe possesses all ingredients necessary for building a singlet-triplet qubit.
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
acknowledgement: "We thank Matthias Brauns for helpful discussions and careful proofreading
of the manuscript. This project has received funding from the European Union’s Horizon
2020 research and innovation program under the Marie Sklodowska-Curie grant agreement
No 844511 and from the FWF project P30207. The research was supported by the Scientific
Service Units of IST Austria through resources provided by the MIBA machine shop
and the nanofabrication\r\nfacility."
article_number: '1910.05841'
article_processing_charge: No
arxiv: 1
author:
- first_name: Andrea C
full_name: Hofmann, Andrea C
id: 340F461A-F248-11E8-B48F-1D18A9856A87
last_name: Hofmann
- first_name: Daniel
full_name: Jirovec, Daniel
id: 4C473F58-F248-11E8-B48F-1D18A9856A87
last_name: Jirovec
orcid: 0000-0002-7197-4801
- first_name: Maxim
full_name: Borovkov, Maxim
last_name: Borovkov
- first_name: Ivan
full_name: Prieto Gonzalez, Ivan
id: 2A307FE2-F248-11E8-B48F-1D18A9856A87
last_name: Prieto Gonzalez
orcid: 0000-0002-7370-5357
- first_name: Andrea
full_name: Ballabio, Andrea
last_name: Ballabio
- first_name: Jacopo
full_name: Frigerio, Jacopo
last_name: Frigerio
- first_name: Daniel
full_name: Chrastina, Daniel
last_name: Chrastina
- first_name: Giovanni
full_name: Isella, Giovanni
last_name: Isella
- first_name: Georgios
full_name: Katsaros, Georgios
id: 38DB5788-F248-11E8-B48F-1D18A9856A87
last_name: Katsaros
orcid: 0000-0001-8342-202X
citation:
ama: Hofmann AC, Jirovec D, Borovkov M, et al. Assessing the potential of Ge/SiGe
quantum dots as hosts for singlet-triplet qubits. arXiv. doi:10.48550/arXiv.1910.05841
apa: Hofmann, A. C., Jirovec, D., Borovkov, M., Prieto Gonzalez, I., Ballabio, A.,
Frigerio, J., … Katsaros, G. (n.d.). Assessing the potential of Ge/SiGe quantum
dots as hosts for singlet-triplet qubits. arXiv. https://doi.org/10.48550/arXiv.1910.05841
chicago: Hofmann, Andrea C, Daniel Jirovec, Maxim Borovkov, Ivan Prieto Gonzalez,
Andrea Ballabio, Jacopo Frigerio, Daniel Chrastina, Giovanni Isella, and Georgios
Katsaros. “Assessing the Potential of Ge/SiGe Quantum Dots as Hosts for Singlet-Triplet
Qubits.” ArXiv, n.d. https://doi.org/10.48550/arXiv.1910.05841.
ieee: A. C. Hofmann et al., “Assessing the potential of Ge/SiGe quantum dots
as hosts for singlet-triplet qubits,” arXiv. .
ista: Hofmann AC, Jirovec D, Borovkov M, Prieto Gonzalez I, Ballabio A, Frigerio
J, Chrastina D, Isella G, Katsaros G. Assessing the potential of Ge/SiGe quantum
dots as hosts for singlet-triplet qubits. arXiv, 1910.05841.
mla: Hofmann, Andrea C., et al. “Assessing the Potential of Ge/SiGe Quantum Dots
as Hosts for Singlet-Triplet Qubits.” ArXiv, 1910.05841, doi:10.48550/arXiv.1910.05841.
short: A.C. Hofmann, D. Jirovec, M. Borovkov, I. Prieto Gonzalez, A. Ballabio, J.
Frigerio, D. Chrastina, G. Isella, G. Katsaros, ArXiv (n.d.).
date_created: 2021-10-01T12:14:51Z
date_published: 2019-10-13T00:00:00Z
date_updated: 2024-03-25T23:30:14Z
day: '13'
department:
- _id: GeKa
doi: 10.48550/arXiv.1910.05841
ec_funded: 1
external_id:
arxiv:
- '1910.05841'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1910.05841
month: '10'
oa: 1
oa_version: Preprint
project:
- _id: 26A151DA-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '844511'
name: Majorana bound states in Ge/SiGe heterostructures
- _id: 2641CE5E-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P30207
name: Hole spin orbit qubits in Ge quantum wells
publication: arXiv
publication_status: submitted
related_material:
record:
- id: '10058'
relation: dissertation_contains
status: public
status: public
title: Assessing the potential of Ge/SiGe quantum dots as hosts for singlet-triplet
qubits
type: preprint
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2019'
...