Spin current and magnetization induced by circularly polarized synchrotron radiation in magnetically-doped topological insulator Bi_1.37V_0.03Sb_0.6Te₂Se

2015/11/18 by A. M. Shikin, Shikin, A. M., A. A. Rybkina +15
Physics and Astronomy · #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #cond-mat.mtrl-sci

paper · pdf · doi:10.48550/arxiv.1511.05663

5 pages, 3 figures

arxiv created 2015/11/18 · arxiv updated 2015/11/19

Abstract

We propose a hole-induced mechanism of spin-polarized current generation by circularly polarized synchrotron radiation and corresponding induced magnetization in magnetically-doped topological insulators Bi_1.37V_0.03Sb_0.6Te₂Se. Considered spin-polarized current is generated due to the spin-dependent depopulation of the Dirac cone topological surface states at the Fermi level and subsequent compensation of the generated holes. We have found experimentally and theoretically a relation between the generated spin-polarized current and the shift of the electrochemical potential. The out-of-plane magnetization induced by circularly polarized synchrotron radiation and its inversion with switching the direction of circular polarization were experimentally shown and theoretically confirmed.

Related

• Signature of current-induced nuclear spin polarization in (Bi_1-xSb_x)₂Te₃
• Electrical detection of current generated spin in topological insulator surface states: Role of interface resistance
• Study Of Surface Spin-Polarized Electron Accumulation In Topological Insulators Using Scanning Tunneling Microscopy
• Non-local electrical detection of spin-polarized surface currents in the 3D topological insulator BiSbTeSe₂
• Direct observation of spin-polarized surface states in the parent compound of topological insulator Bi-Sb using spin-resolved-ARPES in a 3D Mott-polarimetry spin mode