Disentanglement of Surface and Bulk Rashba Spin Splittings in Noncentrosymmetric BiTeI

作者：Landolt Gabriel^*; Eremeev Sergey V; Koroteev Yury M; Slomski Bartosz; Muff Stefan; Neupert Titus; Kobayashi Masaki; Strocov Vladimir N; Schmitt Thorsten; Aliev Ziya S; Babanly Mahammad B; Amiraslanov Imamaddin R; Chulkov Evgueni V; Osterwalder Juerg; Dil J Hugo

来源：Physical Review Letters, 2012, 109(11): 116403.

DOI：10.1103/PhysRevLett.109.116403

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.

• 出版日期2012-9-13