By comparing topologically trivial materials (Au, Bi, graphene) and topological insulators (Bi1-xSbx, Bi2Se3), we discuss what the features unique to topological surface states are. The properties reported so far for topological insulators are all explained by Rashba effect due to strong spin-orbit interaction and break down of space-inversion symmetry at surfaces. Topological arguments are not needed. Spin-split surface states with spin-texture Fermi surfaces, however, are very attractive play grounds for exploring spin-flow physics.
CITATION STYLE
HASEGAWA, S., & HIRAHARA, T. (2011). Are Topological Insulators Experimentally Verified? Hyomen Kagaku, 32(4), 216–225. https://doi.org/10.1380/jsssj.32.216
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