Topological Surface States Originated Spin-Orbit Torques in Bi2Se3

Abstract

Three dimensional topological insulator bismuth selenide (Bi2Se3) is expected to possess strong spin-orbit coupling and spin-textured topological surface states, and thus exhibit a high charge to spin current conversion efficiency. We evaluate spin-orbit torques in Bi2Se3/Co40Fe40B20 devices at different temperatures by spin torque ferromagnetic resonance measurements. As temperature decreases, the spin-orbit torque ratio increases from ~ 0.047 at 300 K to ~ 0.42 below 50 K. Moreover, we observe a significant out-of-plane torque at low temperatures. Detailed analysis indicates that the origin of the observed spin-orbit torques is topological surface states in Bi2Se3. Our results suggest that topological insulators with strong spin-orbit coupling could be promising candidates as highly efficient spin current sources for exploring next generation of spintronic applications.

References in corpus (1)

• Room Temperature Spin Pumping in Topological Insulator Bi2Se3

Cited by in corpus (14)

• Room-temperature perpendicular magnetization switching through giant spin-orbit torque from sputtered BixSe(1-x) topological insulator material
• Direct visualization of current induced spin accumulation in topological insulators
• Electric-field control of spin-orbit torque in a magnetically doped topological insulator
• Quantum Materials for Spin and Charge Conversion
• Current-nonlinear Hall effect and spin-orbit torque magnetization switching in a magnetic topological insulator
• FMR-related phenomena in spintronic devices
• Switching of Charge-Current-Induced Spin Polarization in the Topological Insulator BiSbTeSe2
• Antidamping spin-orbit torque driven by spin-flip reflection mechanism on the surface of a topological insulator: A time-dependent nonequilibrium Green function approach
• Spin Injection and Inverse Edelstein Effect in the Surface States of Topological Kondo Insulator SmB6
• Origin and Large Enhancement of Large Spin Hall Angle in Weyl Semimetals LaAl$X$ ($X$=Si, Ge)
• Spin-Orbit Torques in Transition Metal Dichalcogenide/Ferromagnet Heterostructures
• Spin-orbit torques and magnetotransport properties of $\alpha$-Sn and $\beta$-Sn heterostructures
• Topological nature of higher-order hinge states revealed by spin transport
• Dynamic detection of current-induced spin-orbit magnetic fields: a phase independent approach