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Strongly correlated topological insulators

October 31, 2011 - 12:30pm
Michael Levin
Department of Physics, UMD

Topological insulators are a new type of band insulator. They are distinguished by the fact that their edges (in the 2D case) or surfaces (in the 3D case) support gapless transport which is extremely robust. In the two dimensional case, topological insulators can be thought of as time reversal invariant analogues of integer quantum Hall states. This analogy is intriguing since integer quantum Hall states are a special case of the far richer class of fractional quantum Hall states. It is natural to wonder: can topological insulators also be generalized?

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