Professor Allan H. MacDonald
University of Texas at Austin
|TITLE:||"Momentum-Spaced Berry Curvature in Graphene and in Topological Insulators"|
|DATE:||Thursday, April 26, 2012|
|PLACE:||Building 212 / A-157|
Refreshments will be served at 10:45 a.m.
ABSTRACT: I will discuss some of the physical consequences of the large momentum space Berry curvatures of topological insulator surface states and graphene two-dimensional electron systems. Particular attention will be played to bilayer graphene which is susceptible to broken symmetry states because of its flat conduction and valence band edges. The gapped broken symmetry states of bilayer graphene are believed to provide a physical realization of a quantized anomalous Hall effect.