# Exchange Energy of the Ferromagnetic Electronic Ground State in a Monolayer Semiconductor

https://mdr.nims.go.jp/datasets/d7376f89-bb0b-405a-bc46-9c6440c61bd9

## File

- [PhysRevLett.133.026501.pdf](https://mdr.nims.go.jp/filesets/fa2252b8-a3ee-4e99-8246-d3f16d02ab2d/download) ([Detail](https://mdr.nims.go.jp/filesets/fa2252b8-a3ee-4e99-8246-d3f16d02ab2d.md))

## Id

d7376f89-bb0b-405a-bc46-9c6440c61bd9

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-02-05T02:15:44.352757Z

## Updated at

2025-02-05T03:31:55.911200Z

## Published at

2025-02-05T03:31:55.977660Z

## Doi



## First published url

https://doi.org/10.1103/physrevlett.133.026501

## Date published

2024-07-08

## Recorded date published

2024-7

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Exchange Energy of the Ferromagnetic Electronic Ground State in a Monolayer
    Semiconductor
  title_type: original
  lang: en

## Description

- description: "Mobile electrons in the semiconductor monolayer-MoS2 form a ferromagnetic
    state at low temper- ature. The Fermi sea consists of two circles, one at the
    K-point, the other at the K ̃-point, both with the same spin. Here, we present
    an optical experiment on gated MoS2 at low electron-density in which excitons
    are injected with known spin and valley quantum numbers. The resulting trions
    are identified using a model which accounts for the injection process, the formation
    of antisymmetrized trion states, electron-hole scattering from one valley to the
    other, and recombination. The results are consistent with a complete spin polarization.
    From the splittings between different trion states, we measure the exchange energy,
    Σ, the energy required to flip a single spin within the ferromagnetic state, as
    well as the intervalley Coulomb exchange energy, J. We determine Σ = 11.2 meV
    and J = 5 meV at n = 1.5 × 1012 cm−2, and find that J depends strongly on the
    electron density, n.\r\n"
  description_type: abstract
  lang: und

## Creator

- name: Nadine Leisgang
  role: author
  orcid: https://orcid.org/0000-0002-6612-866X
- name: Dmitry Miserev
  role: author
  orcid: https://orcid.org/0000-0001-7838-7274
- name: Hinrich Mattiat
  role: author
- name: Lukas Schneider
  role: author
  orcid: https://orcid.org/0009-0000-9212-6644
- name: Lukas Sponfeldner
  role: author
  orcid: https://orcid.org/0000-0002-4634-2722
- 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: Martino Poggio
  role: author
  orcid: https://orcid.org/0000-0002-5327-051X
- name: Richard J. Warburton
  role: author
  orcid: https://orcid.org/0000-0002-3095-3596

## Contact agent



## Publisher

organization: American Physical Society (APS)

## Managing organization



## Keyword

- subject: Ferromagnetic state
  schema: not_defined
- subject: excitons
  schema: not_defined
- subject: Coulomb exchange
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Physical Review Letters
  issn: '00319007'
  volume: '133'
  issue: '2'
  article_number: '026501'

## Conference



## Related item



## Funding

- funder_name: Universität Basel
- funder_name: Swiss Nanoscience Institute
- identifier: P500PT_206917
  funder_name: Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen
    Forschung
- identifier: 21H05233
  funder_name: Japan Society for the Promotion of Science
- identifier: 23H02052
  funder_name: Japan Society for the Promotion of Science
- funder_name: Ministry of Education, Culture, Sports, Science and Technology
- funder_name: World Premier International Research Center Initiative
- funder_name: Georg H. Endress Foundation

## Instrument



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## Fileset

- id: fa2252b8-a3ee-4e99-8246-d3f16d02ab2d
  filename: PhysRevLett.133.026501.pdf
  content_type: application/pdf
  size: 1759125
  md5: aa22866693b3d49f9edda4cd7c62491c

## Thumbnail

fileset_id: fa2252b8-a3ee-4e99-8246-d3f16d02ab2d
filename: PhysRevLett.133.026501.pdf