# Electrical noise spectroscopy of magnons in a quantum Hall ferromagnet

https://mdr.nims.go.jp/datasets/bb8bd92a-b9af-4948-bd1e-c4751995c2f4

## File

- [s41467-024-49446-z.pdf](https://mdr.nims.go.jp/filesets/b69dfc7e-517c-40cc-a034-2524c187566f/download) ([Detail](https://mdr.nims.go.jp/filesets/b69dfc7e-517c-40cc-a034-2524c187566f.md))

## Id

bb8bd92a-b9af-4948-bd1e-c4751995c2f4

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-06T07:34:35.560409Z

## Updated at

2025-02-07T03:30:30.055429Z

## Published at

2025-02-07T03:30:30.149898Z

## Doi



## First published url

https://doi.org/10.1038/s41467-024-49446-z

## Date published

2024-06-12

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Electrical noise spectroscopy of magnons in a quantum Hall ferromagnet
  title_type: original
  lang: en

## Description

- description: Collective spin-wave excitations – magnons – in a quantum Hall ferromagnet
    are promising quasi- particles for next-generation spintronics devices, including
    platforms for information transfer. Detec- tion of these charge-neutral excitations
    relies on the conversion of magnons into electrical signals in the form of excess
    electrons and holes, but if these signals are equal the magnon detection remains
    elusive. In this work, we overcome this shortcoming by measuring the electrical
    noise generated by magnons. We use the symmetry-broken quantum Hall ferromagnet
    of the zeroth Landau level in graphene to launch magnons. Absorption of these
    magnons creates excess noise above the Zeeman energy and remains finite even when
    the average electrical signal is zero. Moreover, we formulate a theoretical model
    in which the noise is generated by equilibration (partial or full, depending on
    the bias voltage) between edge channels and propagating magnons. Our model, which
    agrees with ex- perimental observations, also allows us to pinpoint the regime
    of ballistic magnon transport in our device.
  description_type: abstract
  lang: und

## Creator

- name: Ravi Kumar
  role: author
- name: Saurabh Kumar Srivastav
  role: author
  orcid: https://orcid.org/0000-0002-0498-4217
- name: Ujjal Roy
  role: author
- name: Jinhong Park
  role: author
  orcid: https://orcid.org/0000-0003-3570-6356
- name: Christian Spånslätt
  role: author
  orcid: https://orcid.org/0000-0001-6746-5433
- name: K. Watanabe
  role: author
  orcid: https://orcid.org/0000-0003-3701-8119
- name: T. Taniguchi
  role: author
  orcid: https://orcid.org/0000-0002-1467-3105
- name: Yuval Gefen
  role: author
  orcid: https://orcid.org/0009-0002-4553-6039
- name: Alexander D. Mirlin
  role: author
- name: Anindya Das
  role: author
  orcid: https://orcid.org/0000-0002-6310-1576

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: Spin-wave excitations
  schema: not_defined
- subject: quantum Hall ferromagnets
  schema: not_defined
- subject: electrical noise
  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: '15'
  issue: '1'
  article_number: '4998'

## Conference



## Related item



## Funding

- identifier: SP/SERB-22-0387
  funder_name: DST | Science and Engineering Research Board

## 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: b69dfc7e-517c-40cc-a034-2524c187566f
  filename: s41467-024-49446-z.pdf
  content_type: application/pdf
  size: 1377448
  md5: d2c7d987a92bdace4f1a192ec2c85576

## Thumbnail

fileset_id: b69dfc7e-517c-40cc-a034-2524c187566f
filename: s41467-024-49446-z.pdf