# Determination of topological edge quantum numbers of fractional quantum Hall phases by thermal conductance measurements

https://mdr.nims.go.jp/datasets/6ba611e1-f4f4-4e55-ace6-74d6c583903c

## File

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## Id

6ba611e1-f4f4-4e55-ace6-74d6c583903c

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-27T00:03:00.359219Z

## Updated at

2025-02-27T07:31:13.422877Z

## Published at

2025-02-27T07:31:13.537332Z

## Doi



## First published url

https://doi.org/10.1038/s41467-022-32956-z

## Date published

2022-09-03

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Determination of topological edge quantum numbers of fractional quantum Hall
    phases by thermal conductance measurements
  title_type: original
  lang: en

## Description

- description: 'To determine the topological quantum numbers of quantum Hall (QH)
    states hosting counter-propagating (CP) downstream (Nd) and upstream (Nu) edge
    modes, it is pivotal to study quantized transport both in the presence and absence
    of edge mode equilibration. While reaching the non-equilibrated regime is challenging
    for charge transport, we target here the thermal conductance GQ, which is governed
    by quantum numbers Nd and Nu. Our experimental setup, realized with a hBN encapsulated
    graphite gated monolayer graphene device, facilitates experimental control over
    GQ quantization: For temperatures up to 35mK, our measured GQ at ν = 2/3 and 3/5
    (with CP modes) match the quantized values of non-equilibrated regime (Nd + Nu)κ0T,
    where κ0T is a quanta of GQ. With increasing temperature, GQ decreases and even-
    tually takes the value of equilibrated regime |Nd − Nu|κ0T. By contrast, at ν
    =1/3 and 2/5 (no CP modes), GQ remains robustly quantized at Ndκ0T independent
    of the temperature. Our work opens a new route for finding the topological order
    of non-Abelian QH states and for accurately characterizing reconstructed edges.'
  description_type: abstract
  lang: und

## Creator

- name: Saurabh Kumar Srivastav
  role: author
- name: Ravi Kumar
  role: author
- name: Christian Spånslätt
  role: author
- name: K. Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
  organization: National Institute for Materials Science
- name: T. Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
  organization: National Institute for Materials Science
- name: Alexander D. Mirlin
  role: author
- name: Yuval Gefen
  role: author
- name: Anindya Das
  role: author

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: Topological quantum numbers
  schema: not_defined
- subject: fractional quantum Hall
  schema: not_defined
- subject: thermal Hall conductance
  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: '5185'

## Conference



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## Instrument



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## Measurement method



## Specimen



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## Fileset

- id: 01e20073-7712-479c-9147-379d4ed49a14
  filename: s41467-022-32956-z.pdf
  content_type: application/pdf
  size: 1286857
  md5: f4f55b4e2578dd47ee367aa90c1bc5cc

## Thumbnail

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filename: s41467-022-32956-z.pdf