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Charge density wave instabilities of type-II Weyl semimetals in a strong magnetic field

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Title: Charge density wave instabilities of type-II Weyl semimetals in a strong magnetic field
Authors: Trescher, M
Bergholtz, EJ
Udagawa, M
Knolle, J
Item Type: Journal Article
Abstract: 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.
Issue Date: 1-Nov-2017
Date of Acceptance: 8-Jun-2017
URI: http://hdl.handle.net/10044/1/54761
DOI: https://dx.doi.org/10.1103/PhysRevB.96.201101
ISSN: 1098-0121
Publisher: American Physical Society
Journal / Book Title: Physical review B: Condensed matter and materials physics
Volume: 96
Issue: 20
Copyright Statement: Charge density wave instabilities of type-II Weyl semimetals in a strong magnetic field Maximilian Trescher, Emil J. Bergholtz, Masafumi Udagawa, and Johannes Knolle Phys. Rev. B 96, 201101(R) – Published 1 November 2017
Keywords: Science & Technology
Physical Sciences
Physics, Condensed Matter
Physics
FERMION SEMIMETAL
DISCOVERY
ELECTRON
cond-mat.mes-hall
Publication Status: Published
Article Number: 201101
Appears in Collections:Condensed Matter Theory
Physics
Faculty of Natural Sciences



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