Current-Nonlinear Hall Effect and Spin-Orbit Torque Magnetization Switching in a Magnetic Topological Insulator

Yasuda, K.; Tsukazaki, Atsushi; Yoshimi, Ryutaro; Kondou, Kouta; Takahashi, Kei; Otani, Y.; Kawasaki, Masashi; Tokura, Y.

doi:10.1103/physrevlett.119.137204

Cited by 143 publications

(120 citation statements)

References 34 publications

(93 reference statements)

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“…The effective field to current ratio and the spin Hall angle were detected by second‐harmonic methods and were found to be much larger than for HM/FM systems. Similar phenomena in topological insulator/ferromagnet systems were also observed by other groups . The ultralow‐power SOT switching by topological insulators has been shown by N. H. D. Khang et al .…”

Section: Manipulation Of Magnetic Materials By Spin–orbit Torquessupporting

confidence: 84%

Manipulation of Magnetization by Spin–Orbit Torque

Edmonds

Liu

et al. 2018

Adv Quantum Tech

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The control of magnetization by electric current is a rapidly developing area motivated by a strong synergy between breakthrough basic research discoveries and industrial applications in the fields of magnetic recording, magnetic field sensors, spintronics, and nonvolatile memories. In recent years, the discovery of spin–orbit torque has opened a spectrum of opportunities to manipulate the magnetization efficiently. This article presents a review of the historical background and recent literature focusing on spin–orbit torques (SOTs), highlighting the most exciting new scientific results and suggesting promising future research directions. It starts with an introduction and overview of the underlying physics of spin–orbit coupling effects in bulk and at interfaces, and then describes the use of SOTs to control ferromagnets and antiferromagnets. Finally, the prospects for the future development of spintronic devices based on SOTs are summarized.

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Section: Manipulation Of Magnetic Materials By Spin–orbit Torquessupporting

confidence: 84%

Manipulation of Magnetization by Spin–Orbit Torque

Edmonds

Liu

et al. 2018

Adv Quantum Tech

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“…DC measurements of the anomalous Hall effect yield the magnetization of the ferromagnet Cr-(Bi,Sb) 2 Te 3 ; second harmonic analysis shows a record-high spin Hall (charge to spin conversion) ratio near 100 (see [Yasuda et al, 2017], however, for an alternative explanation of second harmonic generation in similar heterostructures). Other experiments have probed the charge-to-spin conversion efficiency using spin pumping schemes [Deorani et al ., 2014; Jamali et al ., 2015; Shiomi et al ., 2014; Rojas-Sánchez et al ., 2016].…”

Section: Spin Transport At and Through Interfacesmentioning

confidence: 99%

Interface-induced phenomena in magnetism

et al. 2017

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This article reviews static and dynamic interfacial effects in magnetism, focusing on interfacially-driven magnetic effects and phenomena associated with spin-orbit coupling and intrinsic symmetry breaking at interfaces. It provides a historical background and literature survey, but focuses on recent progress, identifying the most exciting new scientific results and pointing to promising future research directions. It starts with an introduction and overview of how basic magnetic properties are affected by interfaces, then turns to a discussion of charge and spin transport through and near interfaces and how these can be used to control the properties of the magnetic layer. Important concepts include spin accumulation, spin currents, spin transfer torque, and spin pumping. An overview is provided to the current state of knowledge and existing review literature on interfacial effects such as exchange bias, exchange spring magnets, spin Hall effect, oxide heterostructures, and topological insulators. The article highlights recent discoveries of interface-induced magnetism and non-collinear spin textures, non-linear dynamics including spin torque transfer and magnetization reversal induced by interfaces, and interfacial effects in ultrafast magnetization processes.

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“…Likewise, our present study does not incorporate many-body interactions, which may alter the effect at a quantitative level as in linear response. Resonant photovoltaic effect for Warped Topological Insulator Surface States:-Topological insulators such as Bi 2 Te 3 can host strong spin-orbit torques [57][58][59], and produce strong spin-orbit coupling signatures in optics, transport and magnetism [60][61][62][63][64][65][66][67][68][69][70][71][72][73][74][75][76][77][78][79]. Time-reversal symmetry breaking in these systems can be accomplished by placing the topological insulator on a ferromagnet, as sketched in Fig.…”

mentioning

confidence: 99%

Resonant Photovoltaic Effect in Doped Magnetic Semiconductors

2020

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The rectified non-linear response of a clean undoped semiconductor to an ac electric field includes a well known intrinsic contribution -the shift current. We show that when Kramers degeneracy is broken, a distinct second order rectified response appears that is due to Bloch state anomalous velocities in a system with an oscillating Fermi surface. This effect, which we refer to as the resonant photovoltaic effect (RPE), produces a resonant galvanic current peak at the interband absorption threshold in doped semiconductors or semimetals with approximate particle-hole symmetry. We evaluate the RPE for a model of the surface states of a magnetized topological insulator.

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Current-Nonlinear Hall Effect and Spin-Orbit Torque Magnetization Switching in a Magnetic Topological Insulator

Cited by 143 publications

References 34 publications

Manipulation of Magnetization by Spin–Orbit Torque

Manipulation of Magnetization by Spin–Orbit Torque

Interface-induced phenomena in magnetism

Resonant Photovoltaic Effect in Doped Magnetic Semiconductors

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