Landolt, GabrielEremeev, Sergey V.Koroteev, Yury M.Slomski, BartoszMuff, StefanNeupert, TitusKobayashi, MasakiStrocov, Vladimir N.Schmitt, ThorstenAliev, Ziya S.Babanly, Mahammad B.Amiraslanov, Imamaddin R.Chulkov, Evgueni V.Osterwalder, JuergDil, J. Hugo2015-06-232015-06-232015-06-23201210.1103/PhysRevLett.109.116403https://infoscience.epfl.ch/handle/20.500.14299/115355WOS:000308689000017BiTeI 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.text::journal::journal article::research article