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Topological phases of matter, Anderson localization/delocalization and anomalous transport law

Ryu, S (University of Illinois at Urbana-Champaign)
Tuesday 18 September 2012, 09:30-10:10

Seminar Room 1, Newton Institute


Topological phases of matter are a very quantum, highly entangled state of matter. While topological phases and Anderson localization are a quite big research field by themselves and can be discussed independently, they have a very close connection. I will discuss a cross fertilization of both fields by focusing on, in particular, physics at a boundary of topological phases. Due to the "bulk-boundary correspondence", well known in the quantum Hall effect, quantum transport phenomena mediated by modes appearing at the boundary have a strong stability against impurities. I will extend this idea to a wider class of topological phases in higher dimensions and with the Altland-Zirnbauer discrete symmetries. In topological superconductors in two and three spatial dimensions, I will derive a new thermodynamic relation ("Streda-like" formula) due to the non-zero thermal Hall conductance, and a thernal analogue of the axion electrodynamics.


[zip ]


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