# Emergent helical edge states in a hybridized three-dimensional topological insulator

https://mdr.nims.go.jp/datasets/aa1448b1-4055-4a81-9b17-87f2520a82d1

## Files

- [s41467-022-33643-9.pdf](https://mdr.nims.go.jp/filesets/d26f57bb-62fd-4070-9e4f-424ee545dd5a/download) ([Detail](https://mdr.nims.go.jp/filesets/d26f57bb-62fd-4070-9e4f-424ee545dd5a.md))

## Id

aa1448b1-4055-4a81-9b17-87f2520a82d1

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-26T08:17:03.505085Z

## Updated at

2025-02-27T07:30:45.414284Z

## Published at

2025-02-27T07:30:45.496102Z

## Doi



## First published url

https://doi.org/10.1038/s41467-022-33643-9

## Date published

2022-10-27

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Emergent helical edge states in a hybridized three-dimensional topological
    insulator
  title_type: original
  lang: en

## Description

- description: As the thickness of a three-dimensional (3D) topological insulator
    (TI) becomes comparable to the penetration depth of surface states, quantum tunneling
    between surfaces turns their gapless Dirac electronic structure into a gapped
    spectrum. Whether the surface hybridization gap can host topological edge states
    is still an open question. Herein, we provide transport evidence of 2D topological
    states in the quantum tunneling regime of a bulk insulating 3D TI BiSbTeSe2. Different
    from its trivial insulating phase, this 2D topological state exhibits a finite
    longitudinal conductance at ~2e2/h when the Fermi level is aligned within the
    surface gap, indicating an emergent quantum spin Hall (QSH) state. The transition
    from the QSH to quantum Hall (QH) state in a transverse magnetic field further
    supports the existence of this distinguished 2D topological phase. In addition,
    we demonstrate a second route to realize the 2D topological state via surface
    gap-closing and topological phase transition mechanism mediated by a transverse
    electric field. The experimental realization of the 2D topological phase in a
    3D TI enriches its phase diagram and marks an important step toward functionalized
    topological quantum devices.
  description_type: abstract
  lang: und

## Creator

- name: Su Kong Chong
  role: author
- name: Lizhe Liu
  role: author
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
  ror: https://ror.org/026v1ze26
- name: Taylor D. Sparks
  role: author
- name: Feng Liu
  role: author
- name: Vikram V. Deshpande
  role: author

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: Topological insulator
  schema: not_defined
- subject: quantum tunneling
  schema: not_defined
- subject: quantum spin Hall state
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Nature Communications
  issn: '20411723'
  volume: '13'
  issue: '1'
  article_number: '6386'

## Conference



## Related item



## Funding

- identifier: '1936383'
  funder_name: National Science Foundation

## Instrument



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## Measurement method



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## Fileset

- id: d26f57bb-62fd-4070-9e4f-424ee545dd5a
  filename: s41467-022-33643-9.pdf
  content_type: application/pdf
  size: 1713087
  md5: 6391a959281985ddcf1c2790f8c95daf

## Thumbnail

fileset_id: d26f57bb-62fd-4070-9e4f-424ee545dd5a
filename: s41467-022-33643-9.pdf