TY - JOUR AU - Hsieh, D. AU - Wray, L. AU - Qian, D. AU - Xia, Y. AU - Dil, J. H. AU - Meier, F. AU - Osterwalder, J. AU - Bihlmayer, G. AU - Hor, Y. S. AU - Cava, R. J. AU - Hasan, M. Z. TI - Direct observation of spin-polarized surface states in the parent compound of a topological insulator using spin- and angle-resolved photoemission spectroscopy in a Mott-polarimetry mode JO - New journal of physics VL - 12 SN - 1367-2630 CY - [Bad Honnef] PB - Dt. Physikalische Ges. M1 - PreJuSER-12554 SP - 125001 PY - 2010 N1 - Record converted from VDB: 12.11.2012 AB - We report high-resolution spin-resolved photoemission spectroscopy (spin-ARPES) measurements on the parent compound Sb of the recently discovered three-dimensional topological insulator Bi1-xSbx (Hsieh et al 2008 Nature 452 970, Hsieh et al 2009 Science 323 919). By modulating the incident photon energy, we are able to map both the bulk and the (111) surface band structure, from which we directly demonstrate that the surface bands are spin polarized by the spin-orbit interaction and connect the bulk valence and conduction bands in a topologically non-trivial way. A unique asymmetric Dirac surface state gives rise to a k-splitting of its spin-polarized electronic channels. These results complement our previously published works on this class of materials and re-confirm our discovery of topological insulator states in the Bi1-xSbx series. KW - J (WoSType) LB - PUB:(DE-HGF)16 UR - <Go to ISI:>//WOS:000285013500001 DO - DOI:10.1088/1367-2630/12/12/125001 UR - https://juser.fz-juelich.de/record/12554 ER -