Superlinear Photogalvanic Effects in (Bi0.3Sb0.7)2 (Te0.1Se0.9)3: Probing Three-Dimensional Topological Insulator Surface States at Room Temperature

S. N. Danilov, L. E. Golub, T. Mayer, A. Beer, S. Binder, E. Mönch, J. Minár, M. Kronseder, C. H. Back, D. Bougeard, S. D. Ganichev