Surface and bulk Fermiology and band dispersion in non-centrosymmetric   BiTeI
  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. 
Gabriel Landolt, Sergey V. Eremeev, Yury M. Koroteev, Bartosz Slomski,   Stefan Muff, Masaki Kobayashi, Vladimir N. Strocov,...
cond-mat.mtrl-sci cond-mat.str-el