Correlations in the one-dimensional Hubbard model

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dc.contributor.authorQue, Wei-mingen
dc.contributor.committeecochairBowen, S.P.en
dc.contributor.committeecochairWilliams, C.D.en
dc.contributor.committeememberLee, T.K.en
dc.contributor.committeememberZallen, Richard H.en
dc.contributor.committeememberChang, Lay Namen
dc.contributor.departmentPhysicsen
dc.date.accessioned2017-03-10T18:55:14Zen
dc.date.available2017-03-10T18:55:14Zen
dc.date.issued1986en
dc.description.abstractCorrelation effects in the one-dimensional Hubbard model are studied by application of the L-resolvent method. The calculations are well beyond one-particle mean field approximation. All correlations involving two neighboring sites are included exactly and higher order correlations are approximated. The effects of varying temperature, band filling, Coulomb repulsion and external magnetic field are investigated. Two-site correlations for non-half-filled band fillings are calculated for the first time. Some exact relations between correlation functions are derived by electron-hole symmetry. Results indicate that short-range spin correlations always favor antiferromagnetic order. Large Coulomb repulsion induces a gap in the excitation spectrum and a metal-insulator transition is predicted as the Coulomb repulsion parameter is changed.en
dc.description.degreePh. D.en
dc.format.extentvi, 157 leavesen
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttp://hdl.handle.net/10919/76169en
dc.language.isoen_USen
dc.publisherVirginia Polytechnic Institute and State Universityen
dc.relation.isformatofOCLC# 15050107en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1986.Q74en
dc.subject.lcshPhysics -- Graphic methodsen
dc.titleCorrelations in the one-dimensional Hubbard modelen
dc.typeDissertationen
dc.type.dcmitypeTexten
thesis.degree.disciplinePhysicsen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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