Topological insulators

Topological insulators have attracted much interest recently from Condensed Matter Physics as well as the wider scientific community. They are characterized by having bulk electronic states like that of a standard band gap insulator but with spin-momentum locked conduction channels only at the surface of the material. This spin-polarized surface conduction channel opens up a wide range of exciting technological applications in the future including spintronics and quantum computation. For a well-written review of topological insulators so far please try (M. Z. Hasan , C. L. Kane Rev. Mod. Phys. (82), 3045-3067).