Photoemission of Bi${}_2$Se${}_3$ with Circularly Polarized Light: Probe of Spin Polarization or Means for Spin Manipulation?

J. Sánchez-Barriga, A. Varykhalov, J. Braun +12

Topological insulators are characterized by Dirac cone surface states with electron spins aligned in the surface plane and perpendicular to their momenta. Recent theoretical and ex…