University of Minnesota
School of Physics & Astronomy

Physics and Astronomy Calendar

Wednesday, December 2nd 2015
1:25 pm:
Speaker: Alex Levchenko, University of Wisconsin
Subject: Anomalous Hall Effect Generalities - The Case of Kondo Topological Insulators

We calculate the anomalous Hall conductivity of surface states on three dimensional topological Kondo insulators with cubic symmetry and multiple Dirac cones. We treat a generic model in which the Fermi velocity, the Fermi momentum and the Zeeman energy in different pockets may be unequal and in which the microscopic impurity potential is short ranged on the scale of the smallest Fermi wavelength. Our calculation of AHE to the zeroth (i.e. leading) order in impurity concentration is based on the Kubo-Smrcka-Streda diagrammatic approach. It also includes certain extrinsic skew scattering contributions with a single cross of impurity lines, which are of the same order in impurity concentration. We discuss various special cases of our result and the experimental relevance of our study in the context of recent hysteretic magnetotransport data in SmB6 samples.

Faculty Host: Vlad Pribiag

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