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  • Title: Disentanglement of surface and bulk Rashba spin splittings in noncentrosymmetric BiTeI.
    Author: Landolt G, Eremeev SV, Koroteev YM, Slomski B, Muff S, Neupert T, Kobayashi M, Strocov VN, Schmitt T, Aliev ZS, Babanly MB, Amiraslanov IR, Chulkov EV, Osterwalder J, Dil JH.
    Journal: Phys Rev Lett; 2012 Sep 14; 109(11):116403. PubMed ID: 23005655.
    Abstract:
    BiTeI has a layered and noncentrosymmetric structure where strong spin-orbit interaction leads to a giant Rashba spin splitting in the bulk bands. We present direct measurements of the bulk band structure obtained with soft x-ray angle-resolved photoemission (ARPES), revealing the three-dimensional Fermi surface. The observed spindle torus shape bears the potential for a topological transition in the bulk by hole doping. Moreover, the bulk electronic structure is clearly disentangled from the two-dimensional surface electronic structure by means of high-resolution and spin-resolved ARPES measurements in the ultraviolet regime. All findings are supported by ab initio calculations.
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