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- W3047024992 abstract "Negative magnetoresistance is rare in non-magnetic materials. Recently, a negative magnetoresistance has been observed in the quantum limit of $beta$-Ag$_2$Se, where only one band of Landau levels is occupied in a strong magnetic field parallel to the applied current. $beta$-Ag$_2$Se is a material that host a Kramers Weyl cone with band degeneracy near the Fermi energy. Kramers Weyl cones exist at time-reversal invariant momenta in all symmorphic chiral crystals, and at a subset of these momenta, including the $Gamma$ point, in non-symmorphic chiral crystals. Here, we present a theory for the negative magnetoresistance in the quantum limit of Kramers Weyl semimetals. We show that, although there is a band touching similar to those in Weyl semimetals, negative magnetoresistance can exist without a chiral anomaly. We find that it requires screened Coulomb scattering potentials between electrons and impurities, which is naturally the case in $beta$-Ag$_2$Se." @default.
- W3047024992 created "2020-08-10" @default.
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- W3047024992 date "2020-08-05" @default.
- W3047024992 modified "2023-09-23" @default.
- W3047024992 title "Theory for the negative longitudinal magnetoresistance in the quantum limit of Kramers Weyl semimetals" @default.
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- W3047024992 doi "https://doi.org/10.48550/arxiv.2008.01953" @default.
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