# Strongly coupled edge states in a graphene quantum Hall interferometer

https://mdr.nims.go.jp/datasets/f04b3916-5f59-49cc-af34-da024820323c

## File

- [s41467-024-50695-1.pdf](https://mdr.nims.go.jp/filesets/e1ec6da5-82db-4ab4-9e3c-d7aa819b738c/download) ([Detail](https://mdr.nims.go.jp/filesets/e1ec6da5-82db-4ab4-9e3c-d7aa819b738c.md))

## Id

f04b3916-5f59-49cc-af34-da024820323c

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-05T06:46:42.723650Z

## Updated at

2025-02-06T03:30:50.556756Z

## Published at

2025-02-06T03:30:50.621644Z

## Doi



## First published url

https://doi.org/10.1038/s41467-024-50695-1

## Date published

2024-08-02

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Strongly coupled edge states in a graphene quantum Hall interferometer
  title_type: original
  lang: en

## Description

- description: "Electronic interferometers using the chiral, one-dimensional (1D)
    edge channels of the quantum Hall effect (QHE) can demonstrate a wealth of fundamental
    phenomena. The recent observation of phase jumps in a single edge channel Fabry-Pérot
    (FP) interferometer revealed anyonic quasiparticle exchange statistics in the
    fractional QHE. When multiple edge channels are involved, FP interferometers have
    exhibited anomalous Aharonov-Bohm (AB) interference frequency doubling, suggesting
    interference of \U0001D7D0\U0001D486 quasiparticles. Here, we use a highly tunable
    graphene-based QHE FP interferometer to observe the connection between integer
    QHE interference phase jumps and AB frequency doubling, unveiling the intricate
    nature of inter edge state coupling in a multichannel QHE interferometer. By tuning
    the electron density continuously from the QHE filling factor \U0001D742 < \U0001D7D0
    to \U0001D742 > \U0001D7D5, we observe periodic interference phase jumps leading
    to AB frequency doubling. Our observations clearly demonstrate that in our samples
    the combination of repulsive Coulomb interaction between the spin-split, copropagating
    edge channels and charge quantization explains the frequency-doubled regime without
    electron pairing, via a near-perfect anti-correlation between the two edge channels.
    Our results show that interferometers are sensitive probes of microscopic interactions
    between edge states, which can cause strong correlations between chiral 1D channels
    even in the integer QHE regime.\r\n"
  description_type: abstract
  lang: und

## Creator

- name: Thomas Werkmeister
  role: author
- name: James R. Ehrets
  role: author
- name: Yuval Ronen
  role: author
  orcid: https://orcid.org/0000-0002-2427-2591
- name: Marie E. Wesson
  role: author
- name: Danial Najafabadi
  role: author
- name: Zezhu Wei
  role: author
  orcid: https://orcid.org/0000-0002-2017-8530
- name: Kenji Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
- name: Takashi Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
- name: D. E. Feldman
  role: author
- name: Bertrand I. Halperin
  role: author
  orcid: https://orcid.org/0000-0002-6999-1039
- name: Amir Yacoby
  role: author
  orcid: https://orcid.org/0000-0002-5737-7963
- name: Philip Kim
  role: author
  orcid: https://orcid.org/0000-0002-8255-0086

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: Electronic interferometers
  schema: not_defined
- subject: quantum Hall effect
  schema: not_defined
- subject: phase jumps
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Nature Communications
  issn: '20411723'
  volume: '15'
  issue: '1'
  article_number: '6533'

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## Measurement method



## Specimen



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## Fileset

- id: e1ec6da5-82db-4ab4-9e3c-d7aa819b738c
  filename: s41467-024-50695-1.pdf
  content_type: application/pdf
  size: 4438901
  md5: 2a7aac79943e412d65042eab7a2ae6d6

## Thumbnail

fileset_id: e1ec6da5-82db-4ab4-9e3c-d7aa819b738c
filename: s41467-024-50695-1.pdf