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

Topological Surface States with Persistent High Spin Polarization across the 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, and O. E. Tereshchenko

Phys. Rev. Lett. 109, 166802 – Published 17 October 2012

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.

Received 20 March 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.166802

Authors & Affiliations

K. Miyamoto^1,*, A. Kimura², T. Okuda¹, H. Miyahara², K. Kuroda², H. Namatame¹, M. Taniguchi^1,2, S. V. Eremeev^3,4, T. V. Menshchikova⁴, E. V. Chulkov^5,6, K. A. Kokh⁷, and O. E. Tereshchenko^8,9

¹Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima 739-0046, Japan
²Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
³Institute of Strength Physics and Materials Science, 634021, Tomsk, Russia
⁴Tomsk State University, 634050, Tomsk, Russia
⁵Donostia International Physics Center (DIPC), 20018 San Sebastián/Donostia, Basque Country, Spain
⁶Departamento de Física de Materiales UPV/EHU, Centro de Física de Materiales CFM—MPC and Centro Mixto CSIC-UPV/EHU, 20080 San Sebastián/Donostia, Basque Country, Spain
⁷V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Koptyuga pr. 3, Novosibirsk, 630090 Russia
⁸Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent’eva 13, Novosibirsk, 630090 Russia
⁹Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090 Russia

^*kmiyamoto@hiroshima-u.ac.jp

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand

Issue

Vol. 109, Iss. 16 — 19 October 2012

Reuse & Permissions

Access Options

Author publication services for translation and copyediting assistance advertisement

Physical Review Letters

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, and O. E. Tereshchenko

Phys. Rev. Lett. 109, 166802 – Published 17 October 2012

Abstract

Authors & Affiliations

Article Text (Subscription Required)

Supplemental Material (Subscription Required)

References (Subscription Required)

Issue

Access Options

Authorization Required

Other Options

Download & Share

Images

Figure 1

Figure 2

Figure 3

Log In

Search

Article Lookup

Paste a citation or DOI

Enter a citation

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