# Absence of heat flow in ν = 0 quantum Hall ferromagnet in bilayer graphene

https://mdr.nims.go.jp/datasets/135c9c28-da73-4a4d-ae57-a8f51b086c75

## Files

- [s41567-024-02673-z.pdf](https://mdr.nims.go.jp/filesets/526fd735-5bbc-4bf7-a635-dbea24237118/download) ([Detail](https://mdr.nims.go.jp/filesets/526fd735-5bbc-4bf7-a635-dbea24237118.md))

## Id

135c9c28-da73-4a4d-ae57-a8f51b086c75

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2026-02-05T10:11:39.084799Z

## Updated at

2026-02-06T01:43:38.892845Z

## Published at

2026-02-06T03:20:49.778392Z

## Doi



## First published url

https://doi.org/10.1038/s41567-024-02673-z

## Date published

2024-10-29

## Recorded date published

2024-12

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Absence of heat flow in ν = 0 quantum Hall ferromagnet in bilayer graphene
  title_type: original
  lang: en

## Description

- description: "The charge neutrality point of bilayer graphene, denoted as ν = 0
    state, manifests competing phases marked by spontaneously broken isospin (spin/valley/layer)
    symmetries under external magnetic and electric fields. However, due to their
    electrically insulating nature, identifying these phases through electrical conductance
    measurements remains challenging. A recent theoretical proposal introduces a novel
    approach, employing thermal transport measurements to detect these competing phases.
    Here, we experimentally explore the bulk thermal transport of the ν = 0 state
    in bilayer graphene to investi- gate its ground states and collective excitations
    associated with isospin. While the theory anticipates a finite thermal conductance
    in the ν = 0 state, our findings unveil an absence of detectable thermal con-
    ductance. Through variations in the external electric field and temperature-dependent
    measurements, our results suggest towards gapped collective excitations at ν =
    0 state. Our findings underscore the necessity for further investigations into
    the nature of ν = 0.\r\n"
  description_type: abstract
  lang: und

## Creator

- name: Ravi Kumar
  role: author
- name: Saurabh Kumar Srivastav
  role: author
- name: Ujjal Roy
  role: author
- name: Ujjawal Singhal
  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: Vibhor Singh
  role: author
- name: P. Roulleau
  role: author
- name: Anindya Das
  role: author

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: bilayer graphene
  schema: not_defined
- subject: quantum Hall ferromagnet
  schema: not_defined
- subject: thermal transport
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by/4.0/
  date_licensed: 2024-10-29

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Nature Physics
  issn: '17452481'
  volume: '20'
  issue: '12'
  start_page: 1941
  end_page: 1947

## Conference



## Related item



## Funding



## 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



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## Fileset

- id: 526fd735-5bbc-4bf7-a635-dbea24237118
  filename: s41567-024-02673-z.pdf
  content_type: application/pdf
  size: 1807456
  md5: 7a91174fd7f98e48d9e915327c764946

## Thumbnail

fileset_id: 526fd735-5bbc-4bf7-a635-dbea24237118
filename: s41567-024-02673-z.pdf