Spin current and magnetization induced by circularly polarized synchrotron radiation in magnetically-doped topological insulator Bi$_{1.37}$V$_{0.03}$Sb$_{0.6}$Te$_2$Se

A. M. Shikin; A. A. Rybkina; I. I. Klimovskikh; M. V. Filianina; K. A. Kokh; O. E. Tereshchenko; P. N. Skirdkov; K. A. Zvezdin; A. K. Zvezdin

arXiv · 1511.05663

Spin current and magnetization induced by circularly polarized synchrotron radiation in magnetically-doped topological insulator Bi$_{1.37}$V$_{0.03}$Sb$_{0.6}$Te$_2$Se

A. M. Shikin·A. A. Rybkina·I. I. Klimovskikh·M. V. Filianina·K. A. Kokh·O. E. Tereshchenko·P. N. Skirdkov·K. A. Zvezdin·A. K. Zvezdin

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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$_{1.37}$V$_{0.03}$Sb$_{0.6}$Te$_2$Se. 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.

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A. M. Shikin, A. A. Rybkina, I. I. Klimovskikh, M. V. Filianina, K. A. Kokh, O. E. Tereshchenko, P. N. Skirdkov, K. A. Zvezdin, A. K. Zvezdin. 2015-11-18. Spin current and magnetization induced by circularly polarized synchrotron radiation in magnetically-doped topological insulator Bi$_{1.37}$V$_{0.03}$Sb$_{0.6}$Te$_2$Se. https://arxiv.org/abs/1511.05663

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