# Nonrelativistic Piezomagnetic Effect in an Organic Altermagnet

https://mdr.nims.go.jp/datasets/a037af1f-6bf3-4ce2-83e8-5ada58a2cb73

## File

- [2505.07327v1.pdf](https://mdr.nims.go.jp/filesets/ae92e313-65c3-4498-80ce-dc494bae4a07/download) ([Detail](https://mdr.nims.go.jp/filesets/ae92e313-65c3-4498-80ce-dc494bae4a07.md))

## Id

a037af1f-6bf3-4ce2-83e8-5ada58a2cb73

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-11-07T09:54:16.784425Z

## Updated at

2025-11-10T23:30:06.380228Z

## Published at

2025-11-10T23:22:14.379123Z

## Doi



## First published url

https://doi.org/10.7566/jpsj.94.083702

## Date published

2025-08-15

## Recorded date published

2025-8-15

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: Nonrelativistic Piezomagnetic Effect in an Organic Altermagnet
  title_type: original
  lang: en

## Description

- description: We theoretically study the piezomagnetic effect on the altermagnetic
    state in κ-type molecular conductors, focusing on its nonrelativistic mechanism.
    By introducing shear stress as a monoclinic distortion, we evaluate variations
    in the ef- fective tight-binding model using first-principles calculations. Using
    the derived parameters, we investigate the Hubbard model and its effective Heisenberg
    model on the two-dimensional (distorted) κ-type lattice within mean-field approxima-
    tion. We show that the system exhibits the piezomagnetic effect, i.e., a net magnetization
    induced at finite temperatures in the undoped insulating state and both in the
    ground state and at finite temperatures upon doping. In a real-space pic- ture,
    this uniform magnetization arises from the ferrimagnetic spin structure due to
    inequivalent spin sites induced by lattice distortion. Meanwhile, in a momentum-space
    picture, it stems from the s-wave spin splitting of the electron and magnon bands,
    independent of spin-orbit coupling. We find that this nonrelativistic piezomagnetism
    remains finite, but becomes smaller in the limit of strong dimerization where
    the energy gap between the bonding and antibonding orbitals is infinitely large
    and the d-wave altermagnetic spin splitting is absent, highlighting the importance
    of the multi-orbital nature.
  description_type: abstract
  lang: und

## Creator

- name: Makoto Naka
  role: author
- name: Yukitoshi Motome
  role: author
- name: Tsuyoshi Miyazaki
  role: author
  orcid: https://orcid.org/0000-0003-3534-4404
  organization: National Institute for Materials Science
- name: Hitoshi Seo
  role: author

## Contact agent



## Publisher

organization: Physical Society of Japan

## Managing organization



## Keyword

- subject: Organic Altermagnet
  schema: not_defined
- subject: Non-relativistic Piezomagnetic Effect
  schema: not_defined

## Rights

- identifier: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Journal of the Physical Society of Japan
  issn: '13474073'
  volume: '94'
  article_number: '083702'

## Conference



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## Funding

- identifier: 19K03723
  funder_name: Japan Society for the Promotion of Science
- identifier: 19K21860
  funder_name: Japan Society for the Promotion of Science
- identifier: 20H04463
  funder_name: Japan Society for the Promotion of Science
- identifier: 23H01129
  funder_name: Japan Society for the Promotion of Science
- identifier: 25H00838
  funder_name: Japan Society for the Promotion of Science
- identifier: 25H01247
  funder_name: Japan Society for the Promotion of Science
- identifier: 23K25826
  funder_name: Japan Society for the Promotion of Science
- identifier: 23K03333
  funder_name: Japan Society for the Promotion of Science

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## Fileset

- id: ae92e313-65c3-4498-80ce-dc494bae4a07
  filename: 2505.07327v1.pdf
  content_type: application/pdf
  size: 1362975
  md5: 2602d5ba4636f778e81872fbfddc8044

## Thumbnail

fileset_id: ae92e313-65c3-4498-80ce-dc494bae4a07
filename: 2505.07327v1.pdf