University of Minnesota
School of Physics & Astronomy

Physics and Astronomy Calendar

Thursday, October 2nd 2014
1:25 pm:
Condensed Matter Seminar in 210 Physics
Speaker: Alex Kamenev, University of Minnesota
Subject: "Quantum phase transitions in topological Anderson insulators and superconductors"

I'll talk about quantum criticality in the quasi one-dimensional topological Anderson insulators and superconductors. It turns out that the systems may be fully described in terms of two parameters representing localization and topological properties, respectively. Surfaces of half-integer valued topological parameter define phase boundaries between distinct topological sectors. Upon increasing system size, the two parameters exhibit flow similar to the celebrated two parameter flow describing the quantum Hall transitions. However, unlike the quantum Hall system, an exact analytical description of the entire phase diagram can be given. We check the quantitative validity of our theory by comparison to numerical transfer matrix computations.

Faculty Host: Boris Shklovskii

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