Publication:
Valley Hall phases in kagome lattices

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dc.affiliation.dptoUC3M. Departamento de Físicaes
dc.contributor.authorLera, Natalia
dc.contributor.authorTorrent, Daniel
dc.contributor.authorSan-José, Pablo
dc.contributor.authorChristensen, Johan
dc.contributor.authorÁvarez, J.V.
dc.contributor.funderEuropean Commissionen
dc.contributor.funderMinisterio de Economía y Competitividad (España)es
dc.date.accessioned2020-12-15T12:11:05Z
dc.date.available2020-12-15T12:11:05Z
dc.date.issued2019-04-01
dc.description.abstractWe report the finding of the analogous valley Hall effect in phononic systems arising from mirror symmetry breaking, in addition to spatial inversion symmetry breaking. We study topological phases of plates and spring-mass models in kagome and modified kagome arrangements. By breaking the inversion symmetry it is well known that a defined valley Chern number arises. We also show that effectively, breaking the mirror symmetry leads to the same topological invariant. Based on the bulk-edge correspondence principle, protected edge states appear at interfaces between two lattices with different valley Chern numbers. By means of a plane wave expansion method and the multiple scattering theory for periodic and finite systems, respectively, we computed the Berry curvature, the band inversion, mode shapes, and edge modes in plate systems. We also find that appropriate multipoint excitations in finite system gives rise to propagating waves along a one-sided path only.en
dc.description.sponsorshipN.L and J.V.A. acknowledges financial support from MINECO grant FIS2015-64886-C5-5-P. N.L. acknowledges financial support from the Spanish Ministry of Economy and Competitiveness, through The María de Maeztu Programme for Units of Excellence in R&D (MDM-2014-0377), and also hospitality from the Universitat Jaume I in Castellon where part of this work was done. D.T. acknowledges financial support through the “Ramón y Cajal” fellowship under grant number RYC-2016-21188. P.S.-J. acknowledges financial support from the Spanish Ministry of Economy and Competitiveness through Grant No. FIS2015-65706-P (MINECO/FEDER). J.C. acknowledges the support from the European Research Council (ERC) through the Starting Grant No. 714577 PHONOMETA and from the MINECO through a Ramón y Cajal grant (Grant No. RYC-2015-17156).en
dc.description.statusPublicadoes
dc.format.extent16
dc.identifier.bibliographicCitationPhysical Review B, (2019), 99(13), 134102, [16] p.en
dc.identifier.doihttps://doi.org/10.1103/PhysRevB.99.134102
dc.identifier.issn2469-9950
dc.identifier.publicationfirstpage1
dc.identifier.publicationissue13, 134102
dc.identifier.publicationlastpage16
dc.identifier.publicationtitlePHYSICAL REVIEW Ben
dc.identifier.publicationvolume99
dc.identifier.urihttps://hdl.handle.net/10016/31600
dc.identifier.uxxiAR/0000023498
dc.language.isoengen
dc.publisherAmerican Physical Societyen
dc.relation.projectIDGobierno de España. MDM-2014-0377es
dc.relation.projectIDGobierno de España. RYC-2016-21188es
dc.relation.projectIDComunidad de Madrid. FIS2015-65706-Pes
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/H2020/714577/PHONOMETAen
dc.relation.projectIDGobierno de España. RYC-2015-17156es
dc.relation.projectIDGobierno de España. FIS2015-64886-C5-5-Pes
dc.rights©2019 American Physical Society.en
dc.rights.accessRightsopen accessen
dc.subject.ecienciaFísicaes
dc.subject.otherMechanical and acoustical propertiesen
dc.subject.otherScattering theoryen
dc.subject.otherTopological insulatorsen
dc.subject.otherKagome latticeen
dc.titleValley Hall phases in kagome latticesen
dc.typeresearch article*
dc.type.hasVersionVoR*
dspace.entity.typePublication
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