@article{Wan:2018:1361-648X/aaebed,
author = {Wan, B and Schindler, F and Wang, K and Wu, K and Wan, X and Neupert, T and Lu, H-Z},
doi = {1361-648X/aaebed},
journal = {Journal of Physics: Condensed Matter},
pages = {1--9},
title = {Theory for the negative longitudinal magnetoresistance in the quantum limit of Kramers Weyl semimetals.},
url = {http://dx.doi.org/10.1088/1361-648X/aaebed},
volume = {30},
year = {2018}
}

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TY  - JOUR
AB  - Negative magnetoresistance is rare in non-magnetic materials. Recently, negative magnetoresistance has been observed in the quantum limit of β-Ag2Se, where only one band of Landau levels is occupied in a strong magnetic field parallel to the applied current. β-Ag2Se is a material that hosts 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 Γ 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 β-Ag2Se.
AU  - Wan,B
AU  - Schindler,F
AU  - Wang,K
AU  - Wu,K
AU  - Wan,X
AU  - Neupert,T
AU  - Lu,H-Z
DO  - 1361-648X/aaebed
EP  - 9
PY  - 2018///
SN  - 0953-8984
SP  - 1
TI  - Theory for the negative longitudinal magnetoresistance in the quantum limit of Kramers Weyl semimetals.
T2  - Journal of Physics: Condensed Matter
UR  - http://dx.doi.org/10.1088/1361-648X/aaebed
UR  - https://www.ncbi.nlm.nih.gov/pubmed/30468150
UR  - https://iopscience.iop.org/article/10.1088/1361-648X/aaebed
UR  - http://hdl.handle.net/10044/1/105898
VL  - 30
ER  - 

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