The quantum spin Hall effect and topological insulators

In topological insulators, spin?orbit coupling and time-reversal symmetry combine to form a novel state of matter predicted to have exotic physical properties. More... Archived source: https://web.archive.org/web/20100113214822/http://www.spacetimeandtheuniverse.com:80/general-physics/3258-quantum-spin-hall-effect-topological-insulators.html