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Modulation of charge-density waves by superlattice structures

dc.contributor.authorMalvezzi, André Luiz [UNESP]
dc.contributor.authorPaiva, Thereza
dc.contributor.authordos Santos, Raimundo R.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal do Rio de Janeiro (UFRJ)
dc.date.accessioned2014-05-20T15:28:32Z
dc.date.available2014-05-20T15:28:32Z
dc.date.issued2006-05-01
dc.description.abstractWe discuss the interplay between electronic correlations and an underlying superlattice structure in determining the period of charge density waves (CDW's), by considering a one-dimensional Hubbard model with a repeated (nonrandom) pattern of repulsive (U > 0) and free (U=0) sites. Density matrix renormalization group diagonalization of finite systems (up to 120 sites) is used to calculate the charge-density correlation function and structure factor in the ground state. The modulation period can still be predicted through effective Fermi wave vectors k(F)(*) and densities, and we have found that it is much more sensitive to electron (or hole) doping, both because of the narrow range of densities needed to go from q(*)=0 to pi, but also due to sharp 2k(F)(*)-4k(F)(*) transitions; these features render CDW's more versatile for actual applications in heterostructures than in homogeneous systems.en
dc.description.affiliationUniv Estadual Paulista, Fac Ciências, Dept Fis, BR-17015970 Bauru, SP, Brazil
dc.description.affiliationUniv Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio de Janeiro, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Fac Ciências, Dept Fis, BR-17015970 Bauru, SP, Brazil
dc.format.extent4
dc.identifierhttp://dx.doi.org/10.1103/PhysRevB.73.193407
dc.identifier.citationPhysical Review B. College Pk: Amer Physical Soc, v. 73, n. 19, 4 p., 2006.
dc.identifier.doi10.1103/PhysRevB.73.193407
dc.identifier.fileWOS000237950400031.pdf
dc.identifier.issn1098-0121
dc.identifier.lattes4459191234201599
dc.identifier.urihttp://hdl.handle.net/11449/38324
dc.identifier.wosWOS:000237950400031
dc.language.isoeng
dc.publisherAmer Physical Soc
dc.relation.ispartofPhysical Review B
dc.relation.ispartofsjr1,604
dc.rights.accessRightsAcesso abertopt
dc.sourceWeb of Science
dc.titleModulation of charge-density waves by superlattice structuresen
dc.typeArtigopt
dcterms.licensehttp://publish.aps.org/authors/transfer-of-copyright-agreement
dcterms.rightsHolderAmer Physical Soc
dspace.entity.typePublication
relation.isOrgUnitOfPublicationaef1f5df-a00f-45f4-b366-6926b097829b
relation.isOrgUnitOfPublication.latestForDiscoveryaef1f5df-a00f-45f4-b366-6926b097829b
unesp.author.lattes4459191234201599[1]
unesp.author.orcid0000-0002-3195-9551[1]
unesp.author.orcid0000-0002-4199-3809[2]
unesp.author.orcid0000-0002-4469-621X[3]
unesp.campusUniversidade Estadual Paulista (UNESP), Faculdade de Ciências, Baurupt
unesp.departmentFísica - FCpt

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