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arXiv · 1203.4439

Topological Surface States with Persistent High Spin Polarization across Dirac Point in Bi$_{2}$Te$_{2}$Se and Bi$_{2}$Se$_{2}$Te

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
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Abstract

Helical spin textures with the marked spin polarizations of topological surface states have been firstly unveiled by the 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. The highly spin-polarized natures are found to be persistent across the Dirac point in both compounds. This novel finding paves a pathway to extending their utilization of topological surface state for future spintronic applications.

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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. 2012-03-20. Topological Surface States with Persistent High Spin Polarization across Dirac Point in Bi$_{2}$Te$_{2}$Se and Bi$_{2}$Se$_{2}$Te. https://doi.org/10.1103/physrevlett.109.166802

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