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Multiple scattering theory of non-Hermitian sonic second-order topological insulators

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dc.affiliation.dptoUC3M. Departamento de Físicaes
dc.contributor.authorRosendo López, María
dc.contributor.authorZhang, Zhiwang
dc.contributor.authorTorrent, Daniel
dc.contributor.authorChristensen, Johan
dc.contributor.funderMinisterio de Economía y Competitividad (España)es
dc.contributor.funderEuropean Commissionen
dc.date.accessioned2020-12-14T11:33:11Z
dc.date.available2020-12-14T11:33:11Z
dc.date.issued2019-10-25
dc.description.abstractTopological phases of sound enable unconventional confinement of acoustic energy at the corners in higher-order topological insulators. These unique states which go beyond the conventional bulk-boundary correspondence have recently been extended to non-Hermitian wave physics comprising finite crystal structures including loss and gain units. We use a multiple scattering theory to calculate these topologically trapped complex states that agree very well to finite element predictions. Moreover, our semi-numerical tool allows us to compute the spectral dependence of corner states in the presence of defects, illustrating the limits of the topological resilience of these confined non-Hermitian acoustic states.en
dc.description.sponsorshipJ.C. acknowledges the support from the European Research Council (ERC) through the Starting Grant 714577 PHONOMETA and from the MINECO through a Ramón y Cajal grant (Grant No. RYC-2015-17156). D.T. acknowledges the support of MINECO through a Ramón y Cajal grant (Grant No. RYC-2016-21188) and of the Ministry of Science, Innovation and Universities trough project number RTI2018-093921-A-C42.en
dc.description.statusPublicadoes
dc.format.extent7
dc.identifier.bibliographicCitationCommunications Physics, (2019), v. 2, 132, pp.: 1-7.en
dc.identifier.doihttps://doi.org/10.1038/s42005-019-0233-6
dc.identifier.issn2399-3650
dc.identifier.publicationfirstpage1
dc.identifier.publicationlastpage7
dc.identifier.publicationtitleCommunications Physicsen
dc.identifier.publicationvolume2, 132
dc.identifier.urihttps://hdl.handle.net/10016/31592
dc.identifier.uxxiAR/0000024395
dc.language.isoengen
dc.publisherNature Researchen
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/H2020/714577/PHONOMETAen
dc.relation.projectIDGobierno de España. RYC-2015-17156es
dc.relation.projectIDGobierno de España. RYC-2016-21188es
dc.relation.projectIDGobierno de España. RTI2018- 093921-A-C42es
dc.rights© The Author(s) 2019.en
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.rights.accessRightsopen accessen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/*
dc.subject.ecienciaFísicaes
dc.subject.otherApplied physicsen
dc.subject.otherCondensed-matter physicsen
dc.titleMultiple scattering theory of non-Hermitian sonic second-order topological insulatorsen
dc.typeresearch article*
dc.type.hasVersionVoR*
dspace.entity.typePublication
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