---
_id: '7067'
abstract:
- lang: eng
  text: Broken fourfold rotational (C4) symmetry is observed in the experimental properties
    of several classes of unconventional superconductors. It has been proposed that
    this symmetry breaking is important for superconducting pairing in these materials,
    but in the high-Tc cuprates this broken symmetry has never been observed on the
    Fermi surface. Here we report a pronounced anisotropy in the angle dependence
    of the interlayer magnetoresistance of the underdoped high transition temperature
    (high-Tc) superconductor YBa2Cu3O6.58, directly revealing broken C4 symmetry on
    the Fermi surface. Moreover, we demonstrate that this Fermi surface has C2 symmetry
    of the type produced by a uniaxial or anisotropic density-wave phase. This establishes
    the central role of C4 symmetry breaking in the Fermi surface reconstruction of
    YBa2Cu3O6+δ , and suggests a striking degree of universality among unconventional
    superconductors.
article_number: '8'
article_processing_charge: No
article_type: original
author:
- first_name: B. J.
  full_name: Ramshaw, B. J.
  last_name: Ramshaw
- first_name: N.
  full_name: Harrison, N.
  last_name: Harrison
- first_name: S. E.
  full_name: Sebastian, S. E.
  last_name: Sebastian
- first_name: S.
  full_name: Ghannadzadeh, S.
  last_name: Ghannadzadeh
- first_name: Kimberly A
  full_name: Modic, Kimberly A
  id: 13C26AC0-EB69-11E9-87C6-5F3BE6697425
  last_name: Modic
  orcid: 0000-0001-9760-3147
- first_name: D. A.
  full_name: Bonn, D. A.
  last_name: Bonn
- first_name: W. N.
  full_name: Hardy, W. N.
  last_name: Hardy
- first_name: Ruixing
  full_name: Liang, Ruixing
  last_name: Liang
- first_name: P. A.
  full_name: Goddard, P. A.
  last_name: Goddard
citation:
  ama: Ramshaw BJ, Harrison N, Sebastian SE, et al. Broken rotational symmetry on
    the Fermi surface of a high-Tc superconductor. <i>npj Quantum Materials</i>. 2017;2(1).
    doi:<a href="https://doi.org/10.1038/s41535-017-0013-z">10.1038/s41535-017-0013-z</a>
  apa: Ramshaw, B. J., Harrison, N., Sebastian, S. E., Ghannadzadeh, S., Modic, K.
    A., Bonn, D. A., … Goddard, P. A. (2017). Broken rotational symmetry on the Fermi
    surface of a high-Tc superconductor. <i>Npj Quantum Materials</i>. Springer Nature.
    <a href="https://doi.org/10.1038/s41535-017-0013-z">https://doi.org/10.1038/s41535-017-0013-z</a>
  chicago: Ramshaw, B. J., N. Harrison, S. E. Sebastian, S. Ghannadzadeh, Kimberly
    A Modic, D. A. Bonn, W. N. Hardy, Ruixing Liang, and P. A. Goddard. “Broken Rotational
    Symmetry on the Fermi Surface of a High-Tc Superconductor.” <i>Npj Quantum Materials</i>.
    Springer Nature, 2017. <a href="https://doi.org/10.1038/s41535-017-0013-z">https://doi.org/10.1038/s41535-017-0013-z</a>.
  ieee: B. J. Ramshaw <i>et al.</i>, “Broken rotational symmetry on the Fermi surface
    of a high-Tc superconductor,” <i>npj Quantum Materials</i>, vol. 2, no. 1. Springer
    Nature, 2017.
  ista: Ramshaw BJ, Harrison N, Sebastian SE, Ghannadzadeh S, Modic KA, Bonn DA, Hardy
    WN, Liang R, Goddard PA. 2017. Broken rotational symmetry on the Fermi surface
    of a high-Tc superconductor. npj Quantum Materials. 2(1), 8.
  mla: Ramshaw, B. J., et al. “Broken Rotational Symmetry on the Fermi Surface of
    a High-Tc Superconductor.” <i>Npj Quantum Materials</i>, vol. 2, no. 1, 8, Springer
    Nature, 2017, doi:<a href="https://doi.org/10.1038/s41535-017-0013-z">10.1038/s41535-017-0013-z</a>.
  short: B.J. Ramshaw, N. Harrison, S.E. Sebastian, S. Ghannadzadeh, K.A. Modic, D.A.
    Bonn, W.N. Hardy, R. Liang, P.A. Goddard, Npj Quantum Materials 2 (2017).
date_created: 2019-11-19T13:18:30Z
date_published: 2017-02-13T00:00:00Z
date_updated: 2021-01-12T08:11:40Z
day: '13'
ddc:
- '530'
doi: 10.1038/s41535-017-0013-z
extern: '1'
file:
- access_level: open_access
  checksum: 433a26a7e14206e139f3fec2c8ee8623
  content_type: application/pdf
  creator: dernst
  date_created: 2019-11-26T12:57:11Z
  date_updated: 2020-07-14T12:47:48Z
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  file_name: 2017_NPJ_Ramshaw.pdf
  file_size: 1383236
  relation: main_file
file_date_updated: 2020-07-14T12:47:48Z
has_accepted_license: '1'
intvolume: '         2'
issue: '1'
language:
- iso: eng
month: '02'
oa: 1
oa_version: Published Version
publication: npj Quantum Materials
publication_identifier:
  issn:
  - 2397-4648
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
status: public
title: Broken rotational symmetry on the Fermi surface of a high-Tc superconductor
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: 2
year: '2017'
...