# Absence of edge reconstruction for quantum Hall edge channels in graphene devices

https://mdr.nims.go.jp/datasets/b2fc21d6-d3bc-4c8d-b02b-5bd189250fd0

## File

- [sciadv.adf7220.pdf](https://mdr.nims.go.jp/filesets/bfe350b3-4bfc-4132-95ee-a39d8f715e10/download) ([Detail](https://mdr.nims.go.jp/filesets/bfe350b3-4bfc-4132-95ee-a39d8f715e10.md))

## Id

b2fc21d6-d3bc-4c8d-b02b-5bd189250fd0

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-18T00:43:48.352473Z

## Updated at

2025-02-23T13:46:11.370396Z

## Published at

2025-02-23T13:46:11.519645Z

## Doi



## First published url

https://doi.org/10.1126/sciadv.adf7220

## Date published

2023-05-12

## Recorded date published

2023-5-12

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Absence of edge reconstruction for quantum Hall edge channels in graphene
    devices
  title_type: original
  lang: en

## Description

- description: Electronic edge states in topological insulators have become a major
    paradigm in physics. The oldest and primary example is that of quantum Hall (QH)
    edge channels that propagate along the periphery of two-dimensional electron gases
    (2DEGs) under perpendicular magnetic field. Yet, despite 40 years of intensive
    studies using a variety of transport and scanning probe techniques, imaging the
    real-space structure of QH edge channels has proven difficult, mainly due to the
    buried nature of most 2DEGs in semiconductors. Here, we show that QH edge states
    in graphene are confined to a few magnetic lengths at the crystal edges by performing
    scanning tunneling spectroscopy up to the edge of a graphene flake on hexagonal
    boron nitride. These findings indicate that QH edge states are defined by boundary
    conditions of vanishing electronic wavefunctions at the crystal edges, resulting
    in ideal one-dimensional chiral channels, free of electrostatic reconstruction.
    We further evidence a uniform charge carrier density at the edges, contrasting
    with conjectures on the existence of non-topological upstream modes. The absence
    of electrostatic reconstruction of quantum Hall edge states has profound implications
    for the universality of electron and heat transport experiments in graphene-based
    systems and other 2D crystalline materials.
  description_type: abstract
  lang: und

## Creator

- name: Alexis Coissard
  role: author
- name: Adolfo G. Grushin
  role: author
- name: Cécile Repellin
  role: author
- name: Louis Veyrat
  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: Frédéric Gay
  role: author
- name: Hervé Courtois
  role: author
- name: Hermann Sellier
  role: author
- name: Benjamin Sacépé
  role: author

## Contact agent



## Publisher

organization: American Association for the Advancement of Science (AAAS)

## Managing organization



## Keyword

- subject: Quantum Hall edge channels
  schema: not_defined
- subject: graphene
  schema: not_defined
- subject: scanning tunneling spectroscopy
  schema: not_defined

## Rights

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

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## Data origin



## Embargo



## Journal

- title: Science Advances
  issn: '23752548'
  volume: '9'
  issue: '19'
  article_number: eadf7220

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## Fileset

- id: bfe350b3-4bfc-4132-95ee-a39d8f715e10
  filename: sciadv.adf7220.pdf
  content_type: application/pdf
  size: 1240164
  md5: c0625b5e0d4d4aed730a56848ccbf7bd

## Thumbnail

fileset_id: bfe350b3-4bfc-4132-95ee-a39d8f715e10
filename: sciadv.adf7220.pdf