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Quantum oscillations and magnetoresistance in type-II Weyl semimetals: Effect of a field-induced charge density wave
Stockholm University, Faculty of Science, Department of Physics.ORCID iD: 0000-0002-9739-2930
Number of Authors: 32018 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 98, no 12, article id 125304Article in journal (Refereed) Published
Abstract [en]

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 B-2 scaling at particle-hole compensation, while in the extreme quantum limit there is a transition to a qualitatively new scaling with approximately B-0.75 . 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.

Place, publisher, year, edition, pages
2018. Vol. 98, no 12, article id 125304
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-161085DOI: 10.1103/PhysRevB.98.125304ISI: 000444557300004OAI: oai:DiVA.org:su-161085DiVA, id: diva2:1259960
Available from: 2018-10-31 Created: 2018-10-31 Last updated: 2018-10-31Bibliographically approved

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