Layer-By-Layer Entangled Spin-Orbital Texture of the Topological Surface State in Bi2Se3
Z.H. Zhu, C.N. Veenstra, G. Levy, A. Ubaldini, P. Syers, N.P. Butch, J. Paglione, M.W. Haverkort, I.S. Elfimov, A. Damascelli. Phys. Rev. Lett. 110, 216401 (2013).