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Article: Multiscattering effects in disordered two-dimensional anisotropic Weyl fermions

TitleMultiscattering effects in disordered two-dimensional anisotropic Weyl fermions
Authors
KeywordsAnalytical analysis
Anisotropic dispersion
Diffusive conductivity
Impurity scattering
Multi-scattering effects
Issue Date2020
PublisherAmerican Physical Society. The Journal's web site is located at http://journals.aps.org/prb/
Citation
Physical Review B: covering condensed matter and materials physics, 2020, v. 102 n. 13, p. article no. 134207 How to Cite?
AbstractExploiting the Lanczos method in momentum space, we determine accurately the quasiparticle properties of disordered two-dimensional Weyl fermions with anisotropic dispersion, which is linear in one direction and quadratic along the other. For comparison, we also present a perturbative analytical analysis based on the Born approximation and renormalization group methods. We reveal that low-energy quasiparticle properties are substantially corrected by multiple impurity scattering processes and manifested by the power-law function of self-energy. Near the nodal point, quasiparticle residue is considerably reduced and vanishes as ZE∝Er with a disorder-dependent exponent r. To highlight the importance of such unconventional quasiparticle residue behavior, we compute the classical diffusive conductivity via the Kubo formalism. We show that the sharp change of ZE in the vicinity of the nodal point gives rise to the strong temperature dependence of classical conductivity, which can be directly tested by transport measurements in the future. © 2020 American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/290643
ISSN
2023 Impact Factor: 3.2
2023 SCImago Journal Rankings: 1.345
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorNing, Z-
dc.contributor.authorFu, B-
dc.contributor.authorShi, Q-
dc.contributor.authorWang, X-
dc.date.accessioned2020-11-02T05:45:06Z-
dc.date.available2020-11-02T05:45:06Z-
dc.date.issued2020-
dc.identifier.citationPhysical Review B: covering condensed matter and materials physics, 2020, v. 102 n. 13, p. article no. 134207-
dc.identifier.issn2469-9950-
dc.identifier.urihttp://hdl.handle.net/10722/290643-
dc.description.abstractExploiting the Lanczos method in momentum space, we determine accurately the quasiparticle properties of disordered two-dimensional Weyl fermions with anisotropic dispersion, which is linear in one direction and quadratic along the other. For comparison, we also present a perturbative analytical analysis based on the Born approximation and renormalization group methods. We reveal that low-energy quasiparticle properties are substantially corrected by multiple impurity scattering processes and manifested by the power-law function of self-energy. Near the nodal point, quasiparticle residue is considerably reduced and vanishes as ZE∝Er with a disorder-dependent exponent r. To highlight the importance of such unconventional quasiparticle residue behavior, we compute the classical diffusive conductivity via the Kubo formalism. We show that the sharp change of ZE in the vicinity of the nodal point gives rise to the strong temperature dependence of classical conductivity, which can be directly tested by transport measurements in the future. © 2020 American Physical Society.-
dc.languageeng-
dc.publisherAmerican Physical Society. The Journal's web site is located at http://journals.aps.org/prb/-
dc.relation.ispartofPhysical Review B: covering condensed matter and materials physics-
dc.rightsCopyright [2020] by The American Physical Society. This article is available online at [http://dx.doi.org/10.1103/PhysRevB.102.134207].-
dc.subjectAnalytical analysis-
dc.subjectAnisotropic dispersion-
dc.subjectDiffusive conductivity-
dc.subjectImpurity scattering-
dc.subjectMulti-scattering effects-
dc.titleMultiscattering effects in disordered two-dimensional anisotropic Weyl fermions-
dc.typeArticle-
dc.identifier.emailFu, B: fubo@hku.hk-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1103/PhysRevB.102.134207-
dc.identifier.scopuseid_2-s2.0-85093090279-
dc.identifier.hkuros318554-
dc.identifier.volume102-
dc.identifier.issue13-
dc.identifier.spagearticle no. 134207-
dc.identifier.epagearticle no. 134207-
dc.identifier.isiWOS:000577207300002-
dc.publisher.placeUnited States-
dc.identifier.issnl2469-9950-

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