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Inverse Spin-Galvanic Effect in the Interface between a Topological Insulator and a Ferromagnet

2009/11/02 by Ion Garate, Marcel Franz, M. Franz · 18 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Anisotropy #Atomic and Subatomic Physics Research #Condensed matter physics #Electron #Ferromagnetism #Hall effect #Insulator (electricity) #Magnetic field #Magnetization #Materials science #Physics #Quantum Hall effect #Quantum anomalous Hall effect #Quantum mechanics #Quantum spin Hall effect #Spin Hall effect #Spin polarization #Topological Materials and Phenomena #Topological insulator #cond-mat.mes-hall #cond-mat.mtrl-sci #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.104.146802

published as Phys. Rev. Lett. 104, 146802 (2010) · 4 pages, 2 figures; submitted to Phys. Rev. Lett

arxiv created 2009/11/02 · openalex publication_date 2010/04/09 · arxiv updated 2015/05/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

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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