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Spontaneous Coherence and Excitonic Superflow in Quantum Hall Systems

May 10, 2010 - 12:30pm
Speaker: 
Allan MacDonald
Institution: 
University of Texas

I will discuss some properties of ordered states in which coherence is established spontaneously between electrons located in separate two-dimensional electron layers. These exciton condensate states are known to occur in semiconductor quantum wells in the quantum Hall regime and might also occur in graphene bilayers under appropriate circumstances, possibly not requiring the presence of an external magnetic field. My talk will focus on efforts to make sense of the spectacular transport anomalies which occur in these systems because of excitonic superflow.

1201 Physics Building
College Park, MD 20742