---
_id: '12278'
abstract:
- lang: eng
  text: Mercury telluride (HgTe) thin films with a critical thickness of 6.5 nm are
    predicted to possess a gapless Dirac-like band structure. We report a comprehensive
    study on gated and optically doped samples by magnetooptical spectroscopy in the
    THz range. The quasi-classical analysis of the cyclotron resonance allowed the
    mapping of the band dispersion of Dirac charge carriers in a broad range of electron
    and hole doping. A smooth transition through the charge neutrality point between
    Dirac holes and electrons was observed. An additional peak coming from a second
    type of holes with an almost density-independent mass of around 0.04m0 was detected
    in the hole-doping range and attributed to an asymmetric spin splitting of the
    Dirac cone. Spectroscopic evidence for disorder-induced band energy fluctuations
    could not be detected in present cyclotron resonance experiments.
acknowledgement: "This work was supported by the Austrian Science Funds (W1243, I
  3456-N27, I 5539-N).\r\nOpen Access Funding by the Austrian Science Fund (FWF)."
article_number: '2492'
article_processing_charge: Yes
article_type: original
author:
- first_name: Alexey
  full_name: Shuvaev, Alexey
  last_name: Shuvaev
- first_name: Uladzislau
  full_name: Dziom, Uladzislau
  id: 6A9A37C2-8C5C-11E9-AE53-F2FDE5697425
  last_name: Dziom
  orcid: 0000-0002-1648-0999
- first_name: Jan
  full_name: Gospodarič, Jan
  last_name: Gospodarič
- first_name: Elena G.
  full_name: Novik, Elena G.
  last_name: Novik
- first_name: Alena A.
  full_name: Dobretsova, Alena A.
  last_name: Dobretsova
- first_name: Nikolay N.
  full_name: Mikhailov, Nikolay N.
  last_name: Mikhailov
- first_name: Ze Don
  full_name: Kvon, Ze Don
  last_name: Kvon
- first_name: Andrei
  full_name: Pimenov, Andrei
  last_name: Pimenov
citation:
  ama: Shuvaev A, Dziom U, Gospodarič J, et al. Band structure near the Dirac Point
    in HgTe quantum wells with critical thickness. <i>Nanomaterials</i>. 2022;12(14).
    doi:<a href="https://doi.org/10.3390/nano12142492">10.3390/nano12142492</a>
  apa: Shuvaev, A., Dziom, U., Gospodarič, J., Novik, E. G., Dobretsova, A. A., Mikhailov,
    N. N., … Pimenov, A. (2022). Band structure near the Dirac Point in HgTe quantum
    wells with critical thickness. <i>Nanomaterials</i>. MDPI. <a href="https://doi.org/10.3390/nano12142492">https://doi.org/10.3390/nano12142492</a>
  chicago: Shuvaev, Alexey, Uladzislau Dziom, Jan Gospodarič, Elena G. Novik, Alena
    A. Dobretsova, Nikolay N. Mikhailov, Ze Don Kvon, and Andrei Pimenov. “Band Structure
    near the Dirac Point in HgTe Quantum Wells with Critical Thickness.” <i>Nanomaterials</i>.
    MDPI, 2022. <a href="https://doi.org/10.3390/nano12142492">https://doi.org/10.3390/nano12142492</a>.
  ieee: A. Shuvaev <i>et al.</i>, “Band structure near the Dirac Point in HgTe quantum
    wells with critical thickness,” <i>Nanomaterials</i>, vol. 12, no. 14. MDPI, 2022.
  ista: Shuvaev A, Dziom U, Gospodarič J, Novik EG, Dobretsova AA, Mikhailov NN, Kvon
    ZD, Pimenov A. 2022. Band structure near the Dirac Point in HgTe quantum wells
    with critical thickness. Nanomaterials. 12(14), 2492.
  mla: Shuvaev, Alexey, et al. “Band Structure near the Dirac Point in HgTe Quantum
    Wells with Critical Thickness.” <i>Nanomaterials</i>, vol. 12, no. 14, 2492, MDPI,
    2022, doi:<a href="https://doi.org/10.3390/nano12142492">10.3390/nano12142492</a>.
  short: A. Shuvaev, U. Dziom, J. Gospodarič, E.G. Novik, A.A. Dobretsova, N.N. Mikhailov,
    Z.D. Kvon, A. Pimenov, Nanomaterials 12 (2022).
date_created: 2023-01-16T10:02:31Z
date_published: 2022-07-20T00:00:00Z
date_updated: 2023-10-17T11:41:28Z
day: '20'
ddc:
- '530'
department:
- _id: ZhAl
doi: 10.3390/nano12142492
external_id:
  isi:
  - '000834401600001'
file:
- access_level: open_access
  checksum: efad6742f89f39a18bec63116dd689a0
  content_type: application/pdf
  creator: dernst
  date_created: 2023-01-30T11:16:54Z
  date_updated: 2023-01-30T11:16:54Z
  file_id: '12459'
  file_name: 2022_Nanomaterials_Shuvaev.pdf
  file_size: 464840
  relation: main_file
  success: 1
file_date_updated: 2023-01-30T11:16:54Z
has_accepted_license: '1'
intvolume: '        12'
isi: 1
issue: '14'
keyword:
- General Materials Science
- General Chemical Engineering
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
publication: Nanomaterials
publication_identifier:
  issn:
  - 2079-4991
publication_status: published
publisher: MDPI
quality_controlled: '1'
scopus_import: '1'
status: public
title: Band structure near the Dirac Point in HgTe quantum wells with critical thickness
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: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 12
year: '2022'
...
---
_id: '11737'
abstract:
- lang: eng
  text: Spin-orbit coupling in thin HgTe quantum wells results in a relativistic-like
    electron band structure, making it a versatile solid state platform to observe
    and control nontrivial electrodynamic phenomena. Here we report an observation
    of universal terahertz (THz) transparency determined by fine-structure constant
    α≈1/137 in 6.5-nm-thick HgTe layer, close to the critical thickness separating
    phases with topologically different electronic band structure. Using THz spectroscopy
    in a magnetic field we obtain direct evidence of asymmetric spin splitting of
    the Dirac cone. This particle-hole asymmetry facilitates optical control of edge
    spin currents in the quantum wells.
acknowledgement: This work was supported by the Austrian Science Funds (W 1243, I
  3456-N27, I 5539-N).
article_number: '045302'
article_processing_charge: No
article_type: original
author:
- first_name: Uladzislau
  full_name: Dziom, Uladzislau
  id: 6A9A37C2-8C5C-11E9-AE53-F2FDE5697425
  last_name: Dziom
  orcid: 0000-0002-1648-0999
- first_name: A.
  full_name: Shuvaev, A.
  last_name: Shuvaev
- first_name: J.
  full_name: Gospodarič, J.
  last_name: Gospodarič
- first_name: E. G.
  full_name: Novik, E. G.
  last_name: Novik
- first_name: A. A.
  full_name: Dobretsova, A. A.
  last_name: Dobretsova
- first_name: N. N.
  full_name: Mikhailov, N. N.
  last_name: Mikhailov
- first_name: Z. D.
  full_name: Kvon, Z. D.
  last_name: Kvon
- first_name: Zhanybek
  full_name: Alpichshev, Zhanybek
  id: 45E67A2A-F248-11E8-B48F-1D18A9856A87
  last_name: Alpichshev
  orcid: 0000-0002-7183-5203
- first_name: A.
  full_name: Pimenov, A.
  last_name: Pimenov
citation:
  ama: Dziom U, Shuvaev A, Gospodarič J, et al. Universal transparency and asymmetric
    spin splitting near the Dirac point in HgTe quantum wells. <i>Physical Review
    B</i>. 2022;106(4). doi:<a href="https://doi.org/10.1103/PhysRevB.106.045302">10.1103/PhysRevB.106.045302</a>
  apa: Dziom, U., Shuvaev, A., Gospodarič, J., Novik, E. G., Dobretsova, A. A., Mikhailov,
    N. N., … Pimenov, A. (2022). Universal transparency and asymmetric spin splitting
    near the Dirac point in HgTe quantum wells. <i>Physical Review B</i>. American
    Physical Society. <a href="https://doi.org/10.1103/PhysRevB.106.045302">https://doi.org/10.1103/PhysRevB.106.045302</a>
  chicago: Dziom, Uladzislau, A. Shuvaev, J. Gospodarič, E. G. Novik, A. A. Dobretsova,
    N. N. Mikhailov, Z. D. Kvon, Zhanybek Alpichshev, and A. Pimenov. “Universal Transparency
    and Asymmetric Spin Splitting near the Dirac Point in HgTe Quantum Wells.” <i>Physical
    Review B</i>. American Physical Society, 2022. <a href="https://doi.org/10.1103/PhysRevB.106.045302">https://doi.org/10.1103/PhysRevB.106.045302</a>.
  ieee: U. Dziom <i>et al.</i>, “Universal transparency and asymmetric spin splitting
    near the Dirac point in HgTe quantum wells,” <i>Physical Review B</i>, vol. 106,
    no. 4. American Physical Society, 2022.
  ista: Dziom U, Shuvaev A, Gospodarič J, Novik EG, Dobretsova AA, Mikhailov NN, Kvon
    ZD, Alpichshev Z, Pimenov A. 2022. Universal transparency and asymmetric spin
    splitting near the Dirac point in HgTe quantum wells. Physical Review B. 106(4),
    045302.
  mla: Dziom, Uladzislau, et al. “Universal Transparency and Asymmetric Spin Splitting
    near the Dirac Point in HgTe Quantum Wells.” <i>Physical Review B</i>, vol. 106,
    no. 4, 045302, American Physical Society, 2022, doi:<a href="https://doi.org/10.1103/PhysRevB.106.045302">10.1103/PhysRevB.106.045302</a>.
  short: U. Dziom, A. Shuvaev, J. Gospodarič, E.G. Novik, A.A. Dobretsova, N.N. Mikhailov,
    Z.D. Kvon, Z. Alpichshev, A. Pimenov, Physical Review B 106 (2022).
date_created: 2022-08-07T22:01:58Z
date_published: 2022-07-15T00:00:00Z
date_updated: 2023-08-03T12:38:57Z
day: '15'
ddc:
- '530'
department:
- _id: ZhAl
doi: 10.1103/PhysRevB.106.045302
external_id:
  isi:
  - '000834349200010'
file:
- access_level: open_access
  checksum: 115aff9e0cde2f806cb26953d7262791
  content_type: application/pdf
  creator: dernst
  date_created: 2022-08-08T06:58:22Z
  date_updated: 2022-08-08T06:58:22Z
  file_id: '11743'
  file_name: 2022_PhysRevB_Dziom.pdf
  file_size: 774455
  relation: main_file
  success: 1
file_date_updated: 2022-08-08T06:58:22Z
has_accepted_license: '1'
intvolume: '       106'
isi: 1
issue: '4'
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
publication: Physical Review B
publication_identifier:
  eissn:
  - 2469-9969
  issn:
  - 2469-9950
publication_status: published
publisher: American Physical Society
quality_controlled: '1'
scopus_import: '1'
status: public
title: Universal transparency and asymmetric spin splitting near the Dirac point in
  HgTe quantum wells
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: 106
year: '2022'
...