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High spin polarization measured from a topological surface state

The sketch to the left shows the predicted spin-dependent band dispersion for Bi2Te3. The violet vertical line shows the finite k//-value where the measurement to the right was taken. The topological surface state (TSS) shows a high spin polarization but, in addition, bulk states are spin polarized as well. The samples have been grown by our colleagues from Moscow State University.

M. R. Scholz, D. Marchenko, A. Varykhalov, A. Volykhov, L. V. Yashina, and O. Rader, arXiv:1108.1053