Superconducting systems of low dimensionality

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buir.advisorÇıracı, Salim
dc.contributor.authorGedik, M. Zafer
dc.date.accessioned2016-01-08T20:19:31Z
dc.date.available2016-01-08T20:19:31Z
dc.date.issued1992
dc.departmentDepartment of Physicsen_US
dc.descriptionAnkara : The Department of Physics and the Institute of Engineering and Science of Bilkent Univ., 1992.en_US
dc.descriptionThesis (Ph. D.) -- Bilkent University, 1992.en_US
dc.descriptionIncludes bibliographical references leaves 88-99.en_US
dc.description.abstractIt is possible to call the last five years as the golden age of superconductivity. The two most important developments in the field are the discovery of copper oxide and fullerene superconductors. In this work, some possible pairing mechanisms for these materials ai’e examined by giving emphasis on the reduced dimensionality. First, an older problem, spatially separated electron-hole system, is investigated to identify the possible phases in coupled double quantum well structures in electric field. Secondly, the superconducting transition temperature and response to external magnetic fields of layered systems with varying number of layers are studied by means of a microscopic model and its GinzburgLandau version. It is also shown that an interlayer pairing mechanism, phonon assisted tunneling, can induce superconductivity. Finally, effects of the spherical structure of fullerenes are examined by solving a two fermion problem on an isolated molecule where the particles interact via a short range attractive potential. As a possible mechanism of superconductivity in alkali metal doped fullerenes, coupling between electrons and the radial vibrations of the molecule is investigated.en_US
dc.description.degreePh.D.en_US
dc.description.provenanceMade available in DSpace on 2016-01-08T20:19:31Z (GMT). No. of bitstreams: 1 1.pdf: 78510 bytes, checksum: d85492f20c2362aa2bcf4aad49380397 (MD5)en
dc.description.statementofresponsibilityGedik, MZaferen_US
dc.format.extentx, 100 leaves, illustrationsen_US
dc.identifier.urihttp://hdl.handle.net/11693/18457
dc.language.isoEnglishen_US
dc.publisherBilkent Universityen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectSuperconductivityen_US
dc.subjectCoupled double quantum wellsen_US
dc.subjectSpatially separated electron-hole systemen_US
dc.subjectKosterlitz-Thouless transitionen_US
dc.subjectWigner crystalen_US
dc.subjectExciton condensationen_US
dc.subjectLayered superconductorsen_US
dc.subjectSuperconductor-insulator superlatticesen_US
dc.subjectSuperconducting thin filmsen_US
dc.subjectHigh temperature superconductorsen_US
dc.subjectPhonon assisted tunnelingen_US
dc.subjectElectron-phonon interactionen_US
dc.subjectFullerenesen_US
dc.subjectBound-state formationen_US
dc.subjectPolaronen_US
dc.subjectNegative U Hubbard modelen_US
dc.subject.lccQC612.S8 G43 1992en_US
dc.subject.lcshSuperconductors.en_US
dc.subject.lcshSuperconductivity.en_US
dc.subject.lcshOne-dimensional conductors.en_US
dc.titleSuperconducting systems of low dimensionalityen_US
dc.typeThesisen_US

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