Klein tunneling and magnetoresistance of \textit{p-n} junctions in Weyl semimetals

Songci Li, A. V. Andreev, B. Z. Spivak

Published 2016-05-09Version 1

We investigate theoretically the zero temperature conductance and magnetoconductance of ballistic \textit{p-n} junctions in Weyl semimetals. Electron transport is mediated by Klein tunneling between \textit{n}- and \textit{p}- regions. The chiral anomaly that is realized in Weyl semimetals plays a crucial role in the magnetoconductance of the junction. For magnetic fields normal to the plane of the junction the magnetocondactance is positive and linear in $B$ at both weak and strong magnetic fields. In contrast, magnetocondactance in conventional \textit{p-n} junctions is always negative.