# Terahertz electric-field-driven dynamical multiferroicity in SrTiO3

https://mdr.nims.go.jp/datasets/d17ba2ff-cb0e-433e-9161-fef8c9db088b

## File

- [s41586-024-07175-9-2.pdf](https://mdr.nims.go.jp/filesets/844cc838-0135-445c-b0e5-88750d184e73/download) ([Detail](https://mdr.nims.go.jp/filesets/844cc838-0135-445c-b0e5-88750d184e73.md))

## Id

d17ba2ff-cb0e-433e-9161-fef8c9db088b

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2024-04-23T10:47:31.118473Z

## Updated at

2024-04-24T03:30:24.681072Z

## Published at

2024-04-24T03:30:25.122263Z

## Doi



## First published url

https://doi.org/10.1038/s41586-024-07175-9

## Date published

2024-04-18

## Recorded date published

2024-4-18

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Terahertz electric-field-driven dynamical multiferroicity in SrTiO3
  title_type: original
  lang: en

## Description

- description: The emergence of collective order in matter is among the most fundamental
    and intriguing phenomena in physics. In recent years, the ultrafast dynamical
    control and creation of novel ordered states of matter not accessible in thermodynamic
    equilibrium is receiving much attention. Among those, the theoretical concept
    of dynamical multiferroicity has been introduced to describe the emergence of
    magnetization by means of a time-dependent electric polarization in non-ferromagnetic
    materials. In simple terms, a large amplitude coherent rotating motion of the
    ions in a crystal induces a magnetic moment along the axis of rotation. However,
    the experimental verification of this effect is still lacking. Here, we provide
    evidence of room temperature magnetization in the archetypal paraelectric perovskite
    SrTiO3 due to this mechanism. To achieve it, we resonantly drive the infrared-active
    soft phonon mode with intense circularly polarized terahertz electric field, and
    detect a large magneto-optical Kerr effect. A simple model, which includes two
    coupled nonlinear oscillators whose forces and couplings are derived with ab-initio
    calculations using selfconsistent phonon theory at a finite temperature, reproduces
    qualitatively our experimental observations on the temporal and frequency domains.
    A quantitatively correct magnitude of the effect is obtained when one also considers
    the phonon analogue of the reciprocal of the Einsten – de Haas effect, also called
    the Barnett effect, where the total angular momentum from the phonon order is
    transferred to the electronic one. Our findings show a new path for designing
    ultrafast magnetic switches by means of coherent control of lattice vibrations
    with light.
  description_type: abstract
  lang: und

## Creator

- name: M. Basini
  role: author
  orcid: https://orcid.org/0000-0001-8614-7991
- name: M. Pancaldi
  role: author
  orcid: https://orcid.org/0000-0002-4125-3157
- name: B. Wehinger
  role: author
- name: M. Udina
  role: author
  orcid: https://orcid.org/0000-0003-4969-9951
- name: V. Unikandanunni
  role: author
- name: T. Tadano
  role: author
  orcid: https://orcid.org/0000-0002-8132-2161
- name: M. C. Hoffmann
  role: author
  orcid: https://orcid.org/0000-0002-3596-9853
- name: A. V. Balatsky
  role: author
- name: S. Bonetti
  role: author
  orcid: https://orcid.org/0000-0001-9352-2411

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: dynamical multiferroicity
  schema: not_defined
- subject: SrTiO3
  schema: not_defined
- subject: phonon
  schema: not_defined
- subject: magnetism
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Nature
  issn: '00280836'
  volume: '628'
  start_page: 534
  end_page: 539

## Conference



## Related item



## Funding

- identifier: 21K03424
  funder_name: JSPS

## 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: 844cc838-0135-445c-b0e5-88750d184e73
  filename: s41586-024-07175-9-2.pdf
  content_type: application/pdf
  size: 5486058
  md5: 8bf769e29ad3ba6ff6ce41840cc33227

## Thumbnail

fileset_id: 844cc838-0135-445c-b0e5-88750d184e73
filename: s41586-024-07175-9-2.pdf