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Article: Two-Dimensional Dirac Semimetals without Inversion Symmetry

TitleTwo-Dimensional Dirac Semimetals without Inversion Symmetry
Authors
KeywordsEffective Hamiltonian
Exotic transport
First-principles calculation
High throughput
Inversion symmetry
Issue Date2020
PublisherAmerican Physical Society. The Journal's web site is located at https://journals.aps.org/prl/
Citation
Physical Review Letters, 2020, v. 125 n. 11, p. article no. 116402 How to Cite?
AbstractRealizing stable two-dimensional (2D) Dirac points against spin-orbit coupling (SOC) has attracted much attention because it provides a platform to study the unique transport properties. In previous work, Young and Kane [Phys. Rev. Lett. 115, 126803 (2015) proposed stable 2D Dirac points with SOC, in which the Berry curvature and edge states vanish due to the coexistence of inversion and time-reversal symmetries. Herein, using the tight-binding model and k⋅p effective Hamiltonian, we present that 2D Dirac points can survive in the presence of SOC without inversion symmetry. Such 2D Dirac semimetals possess nonzero Berry curvature near the crossing nodes, and two edge states are terminated at one pair of Dirac points. In addition, according to symmetry arguments and high-throughput first-principles calculations, we identify a family of ideal 2D Dirac semimetals, which has nonzero Berry curvature in the vicinity of Dirac points and visible edge states, thus facilitating the experimental observations. Our work shows that 2D Dirac points can emerge without inversion symmetry, which not only enriches the classification of 2D topological semimetals but also provides a promising avenue to observe exotic transport phenomena beyond graphene, e.g., nonlinear Hall effect.
Persistent Identifierhttp://hdl.handle.net/10722/287704
ISSN
2020 Impact Factor: 9.161
2015 SCImago Journal Rankings: 3.731
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorJIN, YJ-
dc.contributor.authorZheng, BB-
dc.contributor.authorXiao, XL-
dc.contributor.authorChen, ZJ-
dc.contributor.authorXu, Y-
dc.contributor.authorXu, H-
dc.date.accessioned2020-10-05T12:02:02Z-
dc.date.available2020-10-05T12:02:02Z-
dc.date.issued2020-
dc.identifier.citationPhysical Review Letters, 2020, v. 125 n. 11, p. article no. 116402-
dc.identifier.issn0031-9007-
dc.identifier.urihttp://hdl.handle.net/10722/287704-
dc.description.abstractRealizing stable two-dimensional (2D) Dirac points against spin-orbit coupling (SOC) has attracted much attention because it provides a platform to study the unique transport properties. In previous work, Young and Kane [Phys. Rev. Lett. 115, 126803 (2015) proposed stable 2D Dirac points with SOC, in which the Berry curvature and edge states vanish due to the coexistence of inversion and time-reversal symmetries. Herein, using the tight-binding model and k⋅p effective Hamiltonian, we present that 2D Dirac points can survive in the presence of SOC without inversion symmetry. Such 2D Dirac semimetals possess nonzero Berry curvature near the crossing nodes, and two edge states are terminated at one pair of Dirac points. In addition, according to symmetry arguments and high-throughput first-principles calculations, we identify a family of ideal 2D Dirac semimetals, which has nonzero Berry curvature in the vicinity of Dirac points and visible edge states, thus facilitating the experimental observations. Our work shows that 2D Dirac points can emerge without inversion symmetry, which not only enriches the classification of 2D topological semimetals but also provides a promising avenue to observe exotic transport phenomena beyond graphene, e.g., nonlinear Hall effect.-
dc.languageeng-
dc.publisherAmerican Physical Society. The Journal's web site is located at https://journals.aps.org/prl/-
dc.relation.ispartofPhysical Review Letters-
dc.rightsCopyright [2020] by The American Physical Society. This article is available online at [http://dx.doi.org/10.1103/PhysRevLett.125.116402].-
dc.subjectEffective Hamiltonian-
dc.subjectExotic transport-
dc.subjectFirst-principles calculation-
dc.subjectHigh throughput-
dc.subjectInversion symmetry-
dc.titleTwo-Dimensional Dirac Semimetals without Inversion Symmetry-
dc.typeArticle-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1103/PhysRevLett.125.116402-
dc.identifier.pmid32976001-
dc.identifier.scopuseid_2-s2.0-85091807272-
dc.identifier.hkuros315054-
dc.identifier.volume125-
dc.identifier.issue11-
dc.identifier.spagearticle no. 116402-
dc.identifier.epagearticle no. 116402-
dc.identifier.isiWOS:000567766000011-
dc.publisher.placeUnited States-
dc.identifier.issnl0031-9007-

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