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Charge density wave instabilities of type-II Weyl semimetals in a strong magnetic field
Stockholm University, Faculty of Science, Department of Physics.ORCID iD: 0000-0002-9739-2930
Number of Authors: 42017 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 96, no 20, article id 201101Article in journal (Refereed) Published
Abstract [en]

Shortly after the discovery of Weyl semimetals, properties related to the topology of their bulk band structure have been observed, e.g., signatures of the chiral anomaly and Fermi arc surface states. These essentially single particle phenomena are well understood, but whether interesting many-body effects due to interactions arise in Weyl systems remains much less explored. Here, we investigate the effect of interactions in a microscopic model of a type-II Weyl semimetal in a strong magnetic field. We identify a charge density wave (CDW) instability even for weak interactions stemming from the emergent nesting properties of the type-II Weyl Landau level dispersion. We map out the dependence of this CDW on magnetic field strength. Remarkably, as a function of decreasing temperature, a cascade of CDW transitions emerges and we predict characteristic signatures for experiments.

Place, publisher, year, edition, pages
2017. Vol. 96, no 20, article id 201101
Keywords [en]
charge density waves, density of states, magnetotransport, semimetals
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-149840DOI: 10.1103/PhysRevB.96.201101ISI: 000414133800001OAI: oai:DiVA.org:su-149840DiVA, id: diva2:1165183
Available from: 2017-12-12 Created: 2017-12-12 Last updated: 2017-12-12Bibliographically approved

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