# Topological electronic states in holey graphyne

https://mdr.nims.go.jp/datasets/c3bb5205-8b4a-4884-85db-3b88c603ea46

## File

- [Topo_HGY_Nanotechnology.pdf](https://mdr.nims.go.jp/filesets/797085ab-49c9-40b3-b72b-2c281556e64e/download) ([Detail](https://mdr.nims.go.jp/filesets/797085ab-49c9-40b3-b72b-2c281556e64e.md))

## Id

c3bb5205-8b4a-4884-85db-3b88c603ea46

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-10-02T01:42:25.663926Z

## Updated at

2025-02-23T13:48:56.496956Z

## Published at

2025-02-23T13:48:56.589440Z

## Doi

https://doi.org/10.48505/nims.4792

## First published url

https://doi.org/10.1088/1361-6528/ad2483

## Date published

2024-05-06

## Recorded date published

2024-5-6

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Topological electronic states in holey graphyne
  title_type: original
  lang: en

## Description

- description: We unveil that the holey graphyne (HGY), a two-dimensional carbon allotrope
    where benzene rings are connected by two −C≡C− bonds fabricated recently in a
    bottom-up way, exhibits topological electronic states. Using first-principles
    calculations and Wannier tight-binding modeling, we discover a higher-order topological
    invariant associated with C2 symmetry of the material, and show that the resultant
    corner modes appear in nanoflakes matching to the structure of precursor reported
    previously, which are ready for direct experimental observations. In addition,
    we find that a band inversion between emergent g-like and h-like orbitals gives
    rise to a nontrivial topology characterized by Z2 invariant protected by an energy
    gap as large as 0.52 eV, manifesting helical edge states mimicking those in the
    prominent quantum spin Hall effect, which can be accessed experimentally after
    hydrogenation in HGY. We hope these findings trigger interests towards exploring
    the topological electronic states in HGY and related future electronics applications.
  description_type: abstract
  lang: und

## Creator

- name: Yong-Cheng Jiang
  role: author
  orcid: https://orcid.org/0000-0001-9824-0907
- name: Toshikaze Kariyado
  role: author
  orcid: https://orcid.org/0000-0002-3746-6803
- name: Xiao Hu
  role: author
  orcid: https://orcid.org/0000-0001-6880-402X

## Contact agent



## Publisher

organization: IOP Publishing

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## Keyword

- subject: holey graphyne
  schema: not_defined
- subject: band structure
  schema: not_defined
- subject: higher order topology
  schema: not_defined
- subject: first-principle calculation
  schema: not_defined

## Rights

- description: This is the Accepted Manuscript version of an article accepted for
    publication in Nanotechnology.  IOP Publishing Ltd is not responsible for any
    errors or omissions in this version of the manuscript or any version derived from
    it.  The Version of Record is available online at https://dx.doi.org/10.1088/1361-6528/ad2483
  identifier: https://creativecommons.org/licenses/by-nc-nd/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo

start_date: 2024-02-19
end_date: 2025-02-19

## Journal

- title: Nanotechnology
  issn: '09574484'
  volume: '35'
  issue: '19'
  start_page: 195201

## Conference



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## Funding

- identifier: JPMJCR18T4
  funder_name: JST
  description: CREST

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## Fileset

- id: 797085ab-49c9-40b3-b72b-2c281556e64e
  filename: Topo_HGY_Nanotechnology.pdf
  content_type: application/pdf
  size: 2130757
  md5: cd22f09974bc406abde2d4392f9c7cba

## Thumbnail

fileset_id: 797085ab-49c9-40b3-b72b-2c281556e64e
filename: Topo_HGY_Nanotechnology.pdf