ISSN - 00036951, EISSN - 10773118, Applied Physics Letters, 2016, vol. 109, 22, p. -
Out-of-plane polarization induced in magnetically-doped topological insulator Bi<inf>1.37</inf>V<inf>0.03</inf>Sb<inf>0.6</inf>Te<inf>2</inf>Se by circularly polarized synchrotron radiation above a Curie temperature
© 2016 Author(s). By means of angle- and spin-resolved photoemission, we demonstrate a possibility of the out-of-plane spin polarization of topological surface states and corresponding lifting of the Kramers degeneracy at the Dirac point induced in magnetically-doped topological insulator Bi 1.37 V 0.03 Sb 0.6 Te 2 Se by circularly polarized synchrotron radiation (SR) at room temperature. It has been shown that the induced out-of-plane polarization is created due to an "optically"-generated uncompensated spin accumulation with transferring the induced torque to the diluted V 3d ions. We have found theoretically a relation between the imbalance in depopulation of the Dirac cone states under photoexcitation, the generation of steady-state uncompensated spin accumulation and the induced magnetization that can be managed by the polarization of SR.