# Comment on “Absence of Topological Protection of the Interface States in <math display="inline">  <mrow>    <msub>      <mrow>        <mi>Z</mi>      </mrow>      <mrow>        <mn>2</mn>      </mrow>    </msub>  </mrow></math> Photonic Crystals”

https://mdr.nims.go.jp/datasets/cac193c7-5a60-4783-90fe-18766320a042

## File

- [PRL_Comment_2025.pdf](https://mdr.nims.go.jp/filesets/6fb57b03-fbe5-4879-9005-b00b39c30b08/download) ([Detail](https://mdr.nims.go.jp/filesets/6fb57b03-fbe5-4879-9005-b00b39c30b08.md))

## Id

cac193c7-5a60-4783-90fe-18766320a042

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-06-02T08:52:27.519830Z

## Updated at

2025-06-03T03:30:12.717008Z

## Published at

2025-06-03T03:21:30.767615Z

## Doi

https://doi.org/10.48505/nims.5512

## First published url

https://doi.org/10.1103/physrevlett.134.099301

## Date published

2025-03-04

## Recorded date published

2025-3

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Comment on “Absence of Topological Protection of the Interface States in
    <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi
    mathvariant="double-struck">Z</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>
    Photonic Crystals”
  title_type: original
  lang: en

## Description

- description: In the previous Letter, Xu et al. reported that edge modes disappear
    in the expanded structure of the Wu-Hu model characterized by Z2 topological index,
    while they appear in the trivial shrunken structure, when the edge cuts through
    the hexagonal unit cell. They then concluded that these edge modes are defect
    modes lacking topological protection. Unfortunately, their approach is not justified,
    rendering the conclusion unsolid.
  description_type: abstract
  lang: und

## Creator

- name: Xing-Xiang Wang
  role: author
  orcid: https://orcid.org/0000-0002-5713-331X
- 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: American Physical Society (APS)

## Managing organization



## Keyword

- subject: topological photonic crystal
  schema: not_defined

## Rights

- description: "©2025 American Physical Society"
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Physical Review Letters
  issn: '00319007'
  volume: '134'
  issue: '9'
  article_number: '099301'

## Conference



## Related item



## Funding

- identifier: JPMJCR18T4
  funder_name: JST
  description: CREST

## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



## Software



## Custom property



## Fileset

- id: 6fb57b03-fbe5-4879-9005-b00b39c30b08
  filename: PRL_Comment_2025.pdf
  content_type: application/pdf
  size: 1056010
  md5: 7c70074a19389422e05a0b9e104a01c4

## Thumbnail

fileset_id: 6fb57b03-fbe5-4879-9005-b00b39c30b08
filename: PRL_Comment_2025.pdf