TY - JOUR
T1 - Quantum oscillations and magnetoresistance in type-II Weyl semimetals
T2 - Effect of a field-induced charge density wave
AU - Trescher, Maximilian
AU - Bergholtz, Emil J.
AU - Knolle, Johannes
N1 - Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/9/12
Y1 - 2018/9/12
N2 - Recent experiments on type-II Weyl semimetals such as WTe2, MoTe2, MoxW1-xTe2, and WP2 reveal remarkable transport properties in the presence of a strong magnetic field, including an extremely large magnetoresistance and an unusual temperature dependence. Here, we investigate magnetotransport via the Kubo formula in a minimal model of a type-II Weyl semimetal taking into account the effect of a charge density wave (CDW) transition, which can arise even at weak coupling in the presence of a strong magnetic field because of the special Landau level dispersion of type-II Weyl systems. Consistent with experimental measurements we find an extremely large magnetoresistance with close to B2 scaling at particle-hole compensation, while in the extreme quantum limit there is a transition to a qualitatively new scaling with approximately B0.75. We also investigate the Shubnikov-de Haas effect and find that the amplitude of the resistivity quantum oscillations are greatly enhanced below the CDW transition temperature which is accompanied by an unusual nonmonotonous (non-Lifshitz-Kosevich) temperature dependence.
AB - Recent experiments on type-II Weyl semimetals such as WTe2, MoTe2, MoxW1-xTe2, and WP2 reveal remarkable transport properties in the presence of a strong magnetic field, including an extremely large magnetoresistance and an unusual temperature dependence. Here, we investigate magnetotransport via the Kubo formula in a minimal model of a type-II Weyl semimetal taking into account the effect of a charge density wave (CDW) transition, which can arise even at weak coupling in the presence of a strong magnetic field because of the special Landau level dispersion of type-II Weyl systems. Consistent with experimental measurements we find an extremely large magnetoresistance with close to B2 scaling at particle-hole compensation, while in the extreme quantum limit there is a transition to a qualitatively new scaling with approximately B0.75. We also investigate the Shubnikov-de Haas effect and find that the amplitude of the resistivity quantum oscillations are greatly enhanced below the CDW transition temperature which is accompanied by an unusual nonmonotonous (non-Lifshitz-Kosevich) temperature dependence.
UR - http://www.scopus.com/inward/record.url?scp=85053451034&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.98.125304
DO - 10.1103/PhysRevB.98.125304
M3 - Article
AN - SCOPUS:85053451034
SN - 2469-9950
VL - 98
JO - Physical Review B
JF - Physical Review B
IS - 12
M1 - 125304
ER -