Interacting topological insulators
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The non-interacting topological insulators (TIs) have attracted great
interest in the last decade. While this class of materials is today
well-understood, the effect of electron-eletron interactions in such
systems remains in general elusive. In this talk, I will address and 
discuss two different aspects of interactions in 2D topological band 
structures: (i) in some cases, strongly interacting TI models can be 
used to describe the exotic magnetic properties of certain transition 
metal oxides. (ii) in other cases, strong interactions can drive a TI into
spin-liquid phases.