Topological surface states with persistent high spin polarization across the Dirac point in Bi2Te2Se and Bi2Se2Te

K Miyamoto; A Kimura; T Okuda; H Miyahara; K Kuroda; H Namatame; M Taniguchi; S V Eremeev; T V Menshchikova; E V Chulkov; K A Kokh; O E Tereshchenko

doi:10.1103/PhysRevLett.109.166802

Topological surface states with persistent high spin polarization across the Dirac point in Bi2Te2Se and Bi2Se2Te

Phys Rev Lett. 2012 Oct 19;109(16):166802. doi: 10.1103/PhysRevLett.109.166802. Epub 2012 Oct 17.

Authors

K Miyamoto¹, A Kimura, T Okuda, H Miyahara, K Kuroda, H Namatame, M Taniguchi, S V Eremeev, T V Menshchikova, E V Chulkov, K A Kokh, O E Tereshchenko

Affiliation

¹ Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan. kmiyamoto@hiroshima-u.ac.jp

PMID: 23215110
DOI: 10.1103/PhysRevLett.109.166802

Abstract

Helical spin textures with marked spin polarizations of topological surface states have been unveiled for the first time by state-of-the-art spin- and angle-resolved photoemission spectroscopy for two promising topological insulators, Bi(2)Te(2)Se and Bi(2)Se(2)Te. Their highly spin-polarized natures are found to be persistent across the Dirac point in both compounds. This novel finding paves a pathway to extending the utilization of topological surface states of these compounds for future spintronic applications.