Dynamically induced magnetism in KTaO3
Open accessAbstract
Dynamical multiferroicity features entangled dynamic orders: fluctuating electric dipoles induce magnetization.Hence, the material with paraelectric fluctuations can develop magnetic signatures if dynamically driven.We identify the paraelectric KTaO 3 (KTO) as a prime candidate for the observation of the dynamical multiferroicity.We show that when a KTO sample is exposed to a circularly polarized laser pulse, the dynamically induced ionic magnetic moments are of the order of 5% of the nuclear magneton per unit cell.We determine the phonon spectrum using ab initio methods, and we identify T 1u as relevant phonon modes that couple to the external field and induce magnetic polarization.We also predict a corresponding electron effect for the dynamically induced magnetic moment, which is enhanced by several orders of magnitude due to the significant mass difference between electron and ionic nucleus.
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It has recently been suggested that in coupled electron-phonon dynamics the reduced mass of the system should be considered.
“It has recently been suggested that in coupled electron–phonon dynamics the reduced mass of the system should be considered33.”
From Terahertz electric-field-driven dynamical multiferroicity in SrTiO3 (2024) · cites this paper as [33]
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- Authors
- Geilhufe, R. M., Juričić, V., Bonetti, S., Zhu, J.-X., & Balatsky, A. V.
- Affiliations
- Nordic Institute for Theoretical Physics (SE)
- Ca' Foscari University of Venice (IT)
- Los Alamos National Laboratory (US)
- Venue
- Physical Review Research
- Publisher
- American Physical Society (APS)
- Published
- 2021-05-10
- Volume
- 3
- Issue
- 2
- ISSN
- 2643-1564 (ISSN-L)
- OpenAlex
- W3139416174
- Cited by
- 53
- References
- 26
- Citations by year
- 2026: 10 · 2025: 12 · 2024: 11 · 2023: 9 · 2022: 10 · 2021: 1
- FWCI
- 1.89
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Physical Review Research (publishedVersion, cc-by)
- arXiv (Cornell University) (submittedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
- Figshare (submittedVersion, cc-by)
- ARCA (Università Ca' Foscari Venezia) (submittedVersion, cc-by-nc-nd)
- OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
- arXiv (Cornell University) (cc-by)
- Funders
- European Research Council
- Seventh Framework Programme (ERS-2018-SYG 810451)
- Knut och Alice Wallenbergs Stiftelse (KAW 2018.0104)
- Los Alamos National Laboratory
- Vetenskapsrådet (2019-04735, 2018-04611, VR 2018-04611)
- Topics
- Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Multiferroics and related materials
- Physical Sciences › Materials Science › Materials Chemistry › Ferroelectric and Piezoelectric Materials
- Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Advanced Condensed Matter Physics
- Keywords
- KTaO3, circularly polarized laser pulses, electron-phonon coupling, electron effects, nuclear magneton
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