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Article overview
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Landau levels with magnetic tunnelling in Weyl semimetal and magnetoconductance of ballistic $p$-$n$ junction | David R. Saykin
; Konstantin S. Tikhonov
; Yaroslav I. Rodionov
; | Date: |
2 Nov 2017 | Abstract: | We study Landau levels (LLs) of Weyl semimetal (WSM) with two adjacent Weyl
nodes. We consider different orientations
$eta=angle(mathbf{B},mathbf{k}_0)$ of magnetic field $mathbf{B}$ with
respect to $mathbf{k}_0$, the vector of Weyl nodes splitting. Magnetic field
facilitates the tunneling between the nodes giving rise to a gap in the
transverse energy of the zeroth LL. We show how the spectrum is rearranged at
different $eta$ and how this manifests itself in the change of behavior of
differential magnetoconductance $dG(B)/dB$ of a ballistic $p$-$n$ junction.
Unlike the single-cone model where Klein tunneling reveals itself in positive
$dG(B)/dB$, in the two-cone case $G(B)$ is non-monotonic with maximum at $B_c
propto Phi_0k_0^2/ln(k_0l_E)$ for large $k_0l_E$, where $l_E=sqrt{hbar
v/|e|E}$ with $E$ for built in electric field and $Phi_0$ for magnetic flux
quantum. | Source: | arXiv, 1711.0684 | Services: | Forum | Review | PDF | Favorites |
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