Magnetic breakdown spectrum of a Kramers-Weyl semimetal release_hz7c3nwpfzgztcufqrcxlvmhdy

by G. Lemut, A. Donís Vela, M. J. Pacholski, J. Tworzydło, C. W. J. Beenakker

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(2020)

Abstract

We calculate the Landau levels of a Kramers-Weyl semimetal thin slab in a perpendicular magnetic field B. The coupling of Fermi arcs on opposite surfaces broadens the Landau levels with a band width that oscillates periodically in 1/B. We interpret the spectrum in terms of a one-dimensional superlattice induced by magnetic breakdown at Weyl points. The band width oscillations may be observed as 1/B-periodic magnetoconductance oscillations, at weaker fields and higher temperatures than the Shubnikov-de Haas oscillations due to Landau level quantization. No such spectrum appears in a generic Weyl semimetal, the Kramers degeneracy at time-reversally invariant momenta is essential.
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Date   2020-04-14
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arXiv  2004.06406v1
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