Gabriel Landolt, Sergey V. Eremeev, Yury M. Koroteev, Bartosz Slomski, Stefan Muff, Masaki Kobayashi, Vladimir N. Strocov, Thorsten Schmitt, Ziya S. Aliev, Mahammad B. Babanly, Imamaddin R. Amiraslanov, Evgueni V. Chulkov, Jurg Osterwalder, J. Hugo Dil
BiTeI has a layered and non-centrosymmetric structure where strong spin-orbit interaction leads to a giant spin splitting in the bulk bands. Here we present high-resolution angle-resolved photoemission (ARPES) data in the UV and soft x-ray regime that clearly disentangle the surface from the bulk electronic structure. Spin-resolved UV-ARPES measurements on opposite, non-equivalent surfaces show identical spin structures, thus clarifying the surface state character. Soft x-ray ARPES data clearly reveal the spindle-torus shape of the bulk Fermi surface, induced by the spin-orbit interaction.
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http://arxiv.org/abs/1204.2196
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