2011 年 32 巻 4 号 p. 182-188
The present article systematically describes surface electronic structure of the topological insulator through a comparison with various types of surface states. Followed by explanations of the state-of-the-art spin- and momentum-resolved photoemission experiments, recent reports of spin-polarized band dispersion of the edge-state (surface state) of the three-dimensional topological insulators are presented.