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

Abstract

We study 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. With the exception of field orientations where the angle between $\mathbf{B}$ and the junction plane is small, magnetoconductance is positive and linear in $B$ at both weak and strong magnetic fields. In contrast, magnetoconductance in conventional \textit{p-n} junctions is always negative.

published version, 6 pages (including appendix) and 2 figures

References in corpus (13)

• Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
• Theoretical Discovery/Prediction: Weyl Semimetal states in the TaAs material (TaAs, NbAs, NbP, TaP) class
• Negative magnetoresistance without well-defined chirality in the Weyl semimetal TaP
• Observation of the chiral magnetic effect in ZrTe5
• Discovery of a Weyl Fermion semimetal state in NbAs
• Selective transmission of Dirac electrons and ballistic magnetoresistance of \textit{n-p} junctions in graphene
• Signatures of the Adler-Bell-Jackiw chiral anomaly in a Weyl Fermion semimetal
• Giant negative magnetoresistance induced by the chiral anomaly in individual Cd3As2 nanowires
• Nonlinear screening and ballistic transport in a graphene p-n junction
• Magneto-transport phenomena related to the chiral anomaly in Weyl semimetals
• Chiral anomaly induced negative magnetoresistance in topological Weyl semimetal NbAs
• Signature of the chiral anomaly in a Dirac semimetal: a current plume steered by a magnetic field
• Magnetoconductance of carbon nanotube p-n junctions

Cited by in corpus (6)

• Longitudinal negative magnetoresistance and magneto-transport phenomena in conventional and topological conductors
• Electrically tunable valley polarization in Weyl semimetals with tilted energy dispersion
• Transport, refraction and interface arcs in junctions of Weyl semimetals
• Conductance modulation in Weyl semimetals with tilted energy dispersion without a band gap
• Landau levels with magnetic tunnelling in Weyl semimetal and magnetoconductance of ballistic $p$-$n$ junction
• Dynamic chiral magnetic effect and Faraday rotation in macroscopically disordered helical metals