Inverse Spin-Galvanic Effect in the Interface between a Topological Insulator and a Ferromagnet
Open accessAbstract
When a ferromagnet is deposited on the surface of a topological insulator the topologically protected surface state develops a gap and becomes a two-dimensional quantum Hall liquid. We demonstrate that the Hall current in such a liquid, induced by an external electric field, can have a dramatic effect on the magnetization dynamics of the ferromagnet by changing the effective anisotropy field. This change is dissipationless and may be substantial even in weakly spin-orbit coupled ferromagnets. We study the possibility of dissipationless current-induced magnetization reversal in monolayer-thin, insulating ferromagnets with a soft perpendicular anisotropy and discuss possible applications of this effect.
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Out-of-plane magnetic order causes a gap in topological Dirac surface electrons, while in-plane magnetic domains cause bands to shift in momentum space.
“The general effect of Zeeman-type magnetic symmetry breaking on topological Dirac surface electrons is shown in Fig. 3c, illustrating that out-of-plane magnetic order will cause a gap, and in-plane magnetic domains will cause bands to shift in momentum space 12 .”
From A topological insulator surface under strong Coulomb, magnetic and disorder perturbations (2011) · cites this paper as [12]
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- Authors
- Garate, I., & Franz, M.
- Affiliations
- Canadian Institute for Advanced Research (CA)
- University of British Columbia (CA)
- ORCID
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2010-04-09
- Volume
- 104
- Issue
- 14
- Pages
- 146802-146802
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W1593981988
- Cited by
- 408
- References
- 35
- Citations by year
- 2026: 12 · 2025: 12 · 2024: 10 · 2023: 19 · 2022: 16 · 2021: 19 · 2020: 21 · 2019: 23 · 2018: 28 · 2017: 27 · 2016: 31 · 2015: 23 · 2014: 41 · 2013: 33 · 2012: 42
- FWCI
- 21.57
- Type
- journal article
- Language
- en
- Open access
- green
- arxiv.org
- Locations
- Physical Review Letters (publishedVersion)
- PubMed (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Magnetic properties of thin films
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Topological Materials and Phenomena
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum and electron transport phenomena
- Keywords
- inverse spin galvanic effect, topological insulators, ferromagnetic materials, topological surface states, quantum Hall liquid, magnetization dynamics, current-induced magnetization reversal, perpendicular magnetic anisotropy, dissipationless current, spin-orbit coupling, ferromagnet/insulator interface
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