Aharonov-Bohm oscillations in a quantum ring: Eccentricity and electric-field effects

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dc.contributor.authorBruno-Alfonso, A.
dc.contributor.authorLatge, A.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal Fluminense (UFF)
dc.date.accessioned2014-05-20T13:26:29Z
dc.date.available2014-05-20T13:26:29Z
dc.date.issued2005-03-01
dc.description.abstractThe effects of an in-plane electric field and eccentricity on the electronic spectrum of a GaAs quantum ring in a perpendicular magnetic field are studied. The effective-mass equation is solved by two different methods: an adiabatic approximation and a diagonalization procedure after a conformal mapping. It is shown that the electric field and the eccentricity may suppress the Aharonov-Bohm oscillations of the lower energy levels. Simple expressions for the threshold energy and the number of flat energy bands are found. In the case of a thin and eccentric ring, the intensity of a critical field which compensates the main effects of eccentricity is determined. The energy spectra are found in qualitative agreement with previous experimental and theoretical works on anisotropic rings.en
dc.description.affiliationUniv Estadual Paulista, Fac Ciências, Dept Matemat, BR-17033360 Bauru, SP, Brazil
dc.description.affiliationUniv Fed Fluminense, Inst Fis, BR-24210340 Niteroi, RJ, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Fac Ciências, Dept Matemat, BR-17033360 Bauru, SP, Brazil
dc.format.extent7
dc.identifierhttp://dx.doi.org/10.1103/PhysRevB.71.125312
dc.identifier.citationPhysical Review B. College Pk: American Physical Soc, v. 71, n. 12, 7 p., 2005.
dc.identifier.doi10.1103/PhysRevB.71.125312
dc.identifier.fileWOS000228923300085.pdf
dc.identifier.issn1098-0121
dc.identifier.lattes1023310738730000
dc.identifier.urihttp://hdl.handle.net/11449/8539
dc.identifier.wosWOS:000228923300085
dc.language.isoeng
dc.publisherAmerican Physical Soc
dc.relation.ispartofPhysical Review B
dc.relation.ispartofsjr1,604
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleAharonov-Bohm oscillations in a quantum ring: Eccentricity and electric-field effectsen
dc.typeArtigo
dcterms.licensehttp://publish.aps.org/authors/transfer-of-copyright-agreement
dcterms.rightsHolderAmerican Physical Soc
unesp.author.lattes1023310738730000[1]
unesp.author.orcid0000-0002-6194-529X[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências, Baurupt
unesp.departmentMatemática - FCpt

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