Roomerature Spin-Orbit Torque Switching Induced by a Topological Insulator

Jiahao Han; A. Richardella; Saima A. Siddiqui; Joseph Finley; N. Samarth; Luqiao Liu

doi:10.1103/PhysRevLett.119.077702

Roomerature Spin-Orbit Torque Switching Induced by a Topological Insulator

Jiahao Han, A. Richardella, Saima A. Siddiqui, Joseph Finley, N. Samarth, Luqiao Liu

Research output: Contribution to journal › Article › peer-review

394 Scopus citations

Abstract

The strongly spin-momentum coupled electronic states in topological insulators (TI) have been extensively pursued to realize efficient magnetic switching. However, previous studies show a large discrepancy of the charge-spin conversion efficiency. Moreover, current-induced magnetic switching with TI can only be observed at cryogenic temperatures. We report spin-orbit torque switching in a TI-ferrimagnet heterostructure with perpendicular magnetic anisotropy at room temperature. The obtained effective spin Hall angle of TI is substantially larger than the previously studied heavy metals. Our results demonstrate robust charge-spin conversion in TI and provide a direct avenue towards applicable TI-based spintronic devices.

Original language	English (US)
Article number	077702
Journal	Physical review letters
Volume	119
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.119.077702
State	Published - Aug 18 2017

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.119.077702

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title = "Roomerature Spin-Orbit Torque Switching Induced by a Topological Insulator",

abstract = "The strongly spin-momentum coupled electronic states in topological insulators (TI) have been extensively pursued to realize efficient magnetic switching. However, previous studies show a large discrepancy of the charge-spin conversion efficiency. Moreover, current-induced magnetic switching with TI can only be observed at cryogenic temperatures. We report spin-orbit torque switching in a TI-ferrimagnet heterostructure with perpendicular magnetic anisotropy at room temperature. The obtained effective spin Hall angle of TI is substantially larger than the previously studied heavy metals. Our results demonstrate robust charge-spin conversion in TI and provide a direct avenue towards applicable TI-based spintronic devices.",

author = "Jiahao Han and A. Richardella and Siddiqui, {Saima A.} and Joseph Finley and N. Samarth and Luqiao Liu",

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AU - Finley, Joseph

AU - Samarth, N.

AU - Liu, Luqiao

PY - 2017/8/18

Y1 - 2017/8/18

N2 - The strongly spin-momentum coupled electronic states in topological insulators (TI) have been extensively pursued to realize efficient magnetic switching. However, previous studies show a large discrepancy of the charge-spin conversion efficiency. Moreover, current-induced magnetic switching with TI can only be observed at cryogenic temperatures. We report spin-orbit torque switching in a TI-ferrimagnet heterostructure with perpendicular magnetic anisotropy at room temperature. The obtained effective spin Hall angle of TI is substantially larger than the previously studied heavy metals. Our results demonstrate robust charge-spin conversion in TI and provide a direct avenue towards applicable TI-based spintronic devices.

AB - The strongly spin-momentum coupled electronic states in topological insulators (TI) have been extensively pursued to realize efficient magnetic switching. However, previous studies show a large discrepancy of the charge-spin conversion efficiency. Moreover, current-induced magnetic switching with TI can only be observed at cryogenic temperatures. We report spin-orbit torque switching in a TI-ferrimagnet heterostructure with perpendicular magnetic anisotropy at room temperature. The obtained effective spin Hall angle of TI is substantially larger than the previously studied heavy metals. Our results demonstrate robust charge-spin conversion in TI and provide a direct avenue towards applicable TI-based spintronic devices.

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Roomerature Spin-Orbit Torque Switching Induced by a Topological Insulator

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