Nearly full spin polarization of the surface state on a topological insulator

Z.-H. Pan, E. Vescovo, A. V. Fedorov, D. Gardner, Y.S. Lee, S. Chu, G. D. Gu, and T. Valla ∗ Condensed Matter Physics and Materials Science Department, Brookhaven National Lab, Upton, NY 11973 National Synchrotron Light Source, Brookhaven National Lab, Upton, NY 11973 Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139 Center for Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139 (Dated: January 31, 2011)