On the stability of Fröhlich bipolarons in spherical quantum dots

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dc.citation.epage5560en_US
dc.citation.issueNumber22en_US
dc.citation.spage5549en_US
dc.citation.volumeNumber14en_US
dc.contributor.authorSenger, R. T.en_US
dc.contributor.authorErçelebi, A.en_US
dc.date.accessioned2016-02-08T10:32:59Z
dc.date.available2016-02-08T10:32:59Z
dc.date.issued2002en_US
dc.departmentDepartment of Physicsen_US
dc.description.abstractIn the strong-electron-phonon-coupling regime, we retrieve the stability criterion for bipolaron formation in a spherical quantum dot. The model that we use consists of a pair of electrons immersed in a reservoir of bulk LO phonons and confined within an isotropic parabolic potential box. In this particular quasi-zero-dimensional geometry, where the electrons do not have any free spatial direction to expand indefinitely, a plausible approach would be to treat the electrons either to form a bipolaronic bound state or enter a state of two close, but individual polarons inside the same dot. The confined two-polaron model adopted here involves the polaron-polaron separation introduced as an adjustable parameter to be determined variationally. It is found that the fundamental effect of imposing such a variational flexibility is to modify the phase diagram to a considerable extent and to sustain the bipolaron phase in a broader domain of stability.en_US
dc.identifier.doi10.1088/0953-8984/14/22/308en_US
dc.identifier.issn0953-8984
dc.identifier.urihttp://hdl.handle.net/11693/24689
dc.language.isoEnglishen_US
dc.publisherInstitute of Physicsen_US
dc.relation.isversionofhttp://dx.doi.org/10.1088/0953-8984/14/22/308en_US
dc.source.titleJournal of Physics Condensed Matteren_US
dc.subjectCalculationsen_US
dc.subjectElectronsen_US
dc.subjectHigh temperature superconductorsen_US
dc.subjectPhase diagramsen_US
dc.subjectPhononsen_US
dc.subjectSemiconductor quantum dotsen_US
dc.subjectStabilityen_US
dc.subjectElectron-phonon couplingen_US
dc.subjectPolaronsen_US
dc.titleOn the stability of Fröhlich bipolarons in spherical quantum dotsen_US
dc.typeArticleen_US

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