---
_id: '10628'
abstract:
- lang: eng
  text: The surface states of 3D topological insulators in general have negligible
    quantum oscillations (QOs) when the chemical potential is tuned to the Dirac points.
    In contrast, we find that topological Kondo insulators (TKIs) can support surface
    states with an arbitrarily large Fermi surface (FS) when the chemical potential
    is pinned to the Dirac point. We illustrate that these FSs give rise to finite-frequency
    QOs, which can become comparable to the extremal area of the unhybridized bulk
    bands. We show that this occurs when the crystal symmetry is lowered from cubic
    to tetragonal in a minimal two-orbital model. We label such surface modes as 'shadow
    surface states'. Moreover, we show that the sufficient next-nearest neighbor out-of-plane
    hybridization leading to shadow surface states can be self-consistently stabilized
    for tetragonal TKIs. Consequently, shadow surface states provide an important
    example of high-frequency QOs beyond the context of cubic TKIs.
acknowledgement: PG acknowledges support from National Science Foundation Awards No.
  DMR-1824265 for this work. AG acknowledges support from the European Union's Horizon
  2020 research and innovation program under the Marie Skłodowska-Curie Grant Agreement
  No. 754411. EMN is supported by ASU startup grant. OE is in part supported by NSF-DMR-1904716.
article_number: '123042'
article_processing_charge: No
article_type: original
arxiv: 1
author:
- first_name: Areg
  full_name: Ghazaryan, Areg
  id: 4AF46FD6-F248-11E8-B48F-1D18A9856A87
  last_name: Ghazaryan
  orcid: 0000-0001-9666-3543
- first_name: Emilian M.
  full_name: Nica, Emilian M.
  last_name: Nica
- first_name: Onur
  full_name: Erten, Onur
  last_name: Erten
- first_name: Pouyan
  full_name: Ghaemi, Pouyan
  last_name: Ghaemi
citation:
  ama: Ghazaryan A, Nica EM, Erten O, Ghaemi P. Shadow surface states in topological
    Kondo insulators. <i>New Journal of Physics</i>. 2021;23(12). doi:<a href="https://doi.org/10.1088/1367-2630/ac4124">10.1088/1367-2630/ac4124</a>
  apa: Ghazaryan, A., Nica, E. M., Erten, O., &#38; Ghaemi, P. (2021). Shadow surface
    states in topological Kondo insulators. <i>New Journal of Physics</i>. IOP Publishing.
    <a href="https://doi.org/10.1088/1367-2630/ac4124">https://doi.org/10.1088/1367-2630/ac4124</a>
  chicago: Ghazaryan, Areg, Emilian M. Nica, Onur Erten, and Pouyan Ghaemi. “Shadow
    Surface States in Topological Kondo Insulators.” <i>New Journal of Physics</i>.
    IOP Publishing, 2021. <a href="https://doi.org/10.1088/1367-2630/ac4124">https://doi.org/10.1088/1367-2630/ac4124</a>.
  ieee: A. Ghazaryan, E. M. Nica, O. Erten, and P. Ghaemi, “Shadow surface states
    in topological Kondo insulators,” <i>New Journal of Physics</i>, vol. 23, no.
    12. IOP Publishing, 2021.
  ista: Ghazaryan A, Nica EM, Erten O, Ghaemi P. 2021. Shadow surface states in topological
    Kondo insulators. New Journal of Physics. 23(12), 123042.
  mla: Ghazaryan, Areg, et al. “Shadow Surface States in Topological Kondo Insulators.”
    <i>New Journal of Physics</i>, vol. 23, no. 12, 123042, IOP Publishing, 2021,
    doi:<a href="https://doi.org/10.1088/1367-2630/ac4124">10.1088/1367-2630/ac4124</a>.
  short: A. Ghazaryan, E.M. Nica, O. Erten, P. Ghaemi, New Journal of Physics 23 (2021).
corr_author: '1'
date_created: 2022-01-16T23:01:28Z
date_published: 2021-12-23T00:00:00Z
date_updated: 2025-04-14T07:43:48Z
day: '23'
ddc:
- '530'
department:
- _id: MiLe
doi: 10.1088/1367-2630/ac4124
ec_funded: 1
external_id:
  arxiv:
  - '2012.11625'
  isi:
  - '000734063700001'
file:
- access_level: open_access
  checksum: 0c3cb6816242fa8afd1cc87a5fe77821
  content_type: application/pdf
  creator: cchlebak
  date_created: 2022-01-17T10:01:58Z
  date_updated: 2022-01-17T10:01:58Z
  file_id: '10632'
  file_name: 2021_NewJourPhys_Ghazaryan.pdf
  file_size: 2533102
  relation: main_file
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file_date_updated: 2022-01-17T10:01:58Z
has_accepted_license: '1'
intvolume: '        23'
isi: 1
issue: '12'
language:
- iso: eng
month: '12'
oa: 1
oa_version: Published Version
project:
- _id: 260C2330-B435-11E9-9278-68D0E5697425
  call_identifier: H2020
  grant_number: '754411'
  name: ISTplus - Postdoctoral Fellowships
publication: New Journal of Physics
publication_identifier:
  issn:
  - 1367-2630
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: Shadow surface states in topological Kondo insulators
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: 23
year: '2021'
...