Electron magnetotransport in disordered Weyl semimetals

by Pavel Ostrovsky

at Condensed Matter Seminar

Mon, 20 Nov 2017, 11:30
Physics building (#54) room 207

Abstract

We study magnetotransport in a disordered Weyl semimetal taking into account localization effects In the vicinity of a Weyl node a single chiral Landau level coexists with a number of conventional non chiral levels Disorder scattering mixes these topologically different modes leading to peculiar localization effects Similar interplay of topology and localization occurs at the edge of a two dimensional topological insulator and in carbon nanotubes We develop a general theory describing transport phenomena in all these cases Our theory yields conductance shot noise power and full counting statistics of the charge transfer In the case of a Weyl semimetal we find that localization is greatly enhanced in a strong magnetic field with the localization length scaling as 1 B This situation is typical for all topological conductors with broken time reversal symmetry Systems with preserved time reversal symmetry e g carbon nanotubes sustain at most one topologically protected channel For this case we derive exact distribution function of transmission probabilities based on the mapping to a certain random matrix model

Created on 13-11-2017 by Bar Lev, Yevgeny (ybarlev)
Updaded on 13-11-2017 by Bar Lev, Yevgeny (ybarlev)