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dc.contributor.authorHyart, Timo
dc.contributor.authorHeikkilä, Tero
dc.date.accessioned2016-06-30T10:00:37Z
dc.date.available2016-06-30T10:00:37Z
dc.date.issued2016
dc.identifier.citationHyart, T., & Heikkilä, T. (2016). Momentum-space structure of surface states in a topological semimetal with a nexus point of Dirac lines. <i>Physical Review B</i>, <i>93</i>(23), Article 235147. <a href="https://doi.org/10.1103/PhysRevB.93.235147" target="_blank">https://doi.org/10.1103/PhysRevB.93.235147</a>
dc.identifier.otherCONVID_26086388
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/50655
dc.description.abstractThree-dimensional topological semimetals come in different variants, either containing Weyl points or Dirac lines. Here we describe a more complicated momentum-space topological defect where several separate Dirac lines connect with each other, forming a momentum-space equivalent of the real-space nexus considered before for helium-3. Close to the nexus the Dirac lines exhibit a transition from type I to type II lines. We consider a general model of stacked honeycomb lattices with the symmetry of Bernal (AB) stacked graphite and show that the structural mirror symmetries in such systems protect the presence of the Dirac lines, and also naturally lead to the formation of the nexus. By the bulk-boundary correspondence of topological media, the presence of Dirac lines lead to the formation of drumhead surface states at the side surfaces of the system. We calculate the surface state spectrum, and especially illustrate the effect of the nexus on these states.en
dc.languageeng
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review B
dc.subject.otherDiracin yhtälö
dc.subject.otherWeylin puolimetallit
dc.subject.othertopological semimetals
dc.subject.otherDirac lines
dc.titleMomentum-space structure of surface states in a topological semimetal with a nexus point of Dirac lines
dc.typeresearch article
dc.identifier.urnURN:NBN:fi:jyu-201606303402
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2016-06-30T09:15:11Z
dc.type.coarhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.description.reviewstatuspeerReviewed
dc.relation.issn1098-0121
dc.relation.numberinseries23
dc.relation.volume93
dc.type.versionpublishedVersion
dc.rights.copyright© 2016 American Physical Society. Published in this repository with the kind permission of the publisher.
dc.rights.accesslevelopenAccessfi
dc.type.publicationarticle
dc.relation.grantnumber284594 AALTO YO
dc.subject.ysotopologiset avaruudet
dc.subject.ysopuolimetallit
dc.subject.ysokvanttimekaniikka
jyx.subject.urihttp://www.yso.fi/onto/yso/p27852
jyx.subject.urihttp://www.yso.fi/onto/yso/p15134
jyx.subject.urihttp://www.yso.fi/onto/yso/p5563
dc.relation.doi10.1103/PhysRevB.93.235147
dc.relation.funderSuomen Akatemiafi
dc.relation.funderAcademy of Finlanden
jyx.fundingprogramHuippuyksikkörahoitus, SAfi
jyx.fundingprogramCentre of Excellence, AoFen
jyx.fundinginformationThis work was supported by the Academy of Finland Centre of Excellence program (Project No. 284594) and the European Research Council (Grant No. 240362-Heattronics).
dc.type.okmA1


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