Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 90: Topological Insulators I
O 90.8: Vortrag
Donnerstag, 10. März 2016, 17:00–17:15, H10
Negative magneto-resistivity in finite-size samples of Weyl semimetals — Pavel Buividovich, Matthias Puhr, and •Semen Valgushev — University of Regensburg, Regensburg, Germany
We numerically study Chiral Magnetic Effect and magneto-resistivity in a slab of parity-breaking Weyl semimetal modeled by Wilson-Dirac hamiltonian with open boundary conditions and subjected to the external magnetic field parallel to the boundaries. We find that the density of CME current is locally non-zero and strongly localized near the boundaries, where it approaches conventional value j=µ5 B / 2π2. We calculate the magneto-resistivity in a physical setup when parallel magnetic and electric fields are applied to the sample and discuss our results in the context of recent experiments on negative magneto-resistivity in Weyl semimetals.