Unoccupied Topological States on Bismuth Chalcogenides

D. Niesner, Th. Fauster, S. V. Eremeev +9

The unoccupied part of the band structure of topological insulators Bi${}_2$Te${}_x$Se${}_{3-x}$ ($x=0,2,3$) is studied by angle-resolved two-photon photoemission and density functiona…