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

摘要

We study the zero temperature conductance and magnetoconductance of ballistic\textit{p-n} junctions in Weyl semimetals. Electron transport is mediated byKlein tunneling between \textit{n}- and \textit{p}- regions. The chiral anomalythat is realized in Weyl semimetals plays a crucial role in themagnetoconductance of the junction. With the exception of field orientationswhere the angle between $\mathbf{B}$ and the junction plane is small,magnetoconductance is positive and linear in $B$ at both weak and strongmagnetic fields. In contrast, magnetoconductance in conventional \textit{p-n}junctions is always negative.