Search for evidence of fermi surface nesting in Bi₂Sr₂Ca₁Cu₂O₈

dc.contributor.authorPotter, Charles D.en
dc.contributor.committeechairRitter, Alfred "Jimmy"en
dc.contributor.committeememberBlecher, Marvinen
dc.contributor.committeememberLee, T.E.en
dc.contributor.committeememberLang, James R.en
dc.contributor.committeememberZallen, Richard H.en
dc.contributor.committeememberZia, Royce K. P.en
dc.contributor.departmentPhysicsen
dc.date.accessioned2014-03-14T21:21:58Zen
dc.date.adate2005-10-21en
dc.date.available2014-03-14T21:21:58Zen
dc.date.issued1992en
dc.date.rdate2005-10-21en
dc.date.sdate2005-10-21en
dc.description.abstractThe electron energy loss spectrometer at Virginia Tech has been modified with new momentum deflectors and various other hardware improvements. In addition to some hardware changes all the software to run the spectrometer and analyze the data has been rewritten. It was suggested by Tsuei (1990) that a nested Fermi surface could be used to explain both the fact that these materials have high superconducting transition temperatures and have linear relaxation rates. It was suggested in that same paper that EELS might be able to confirm the presence of Fermi surface nesting. We have attempted to use transmission electron energy loss spectroscopy in a novel way to search for evidence of Fermi surface nesting in the high T<sub>c</sub> superconductor Bi₂Sr₂Ca₁Cu₂O₈. High quality single crystal samples were obtained and thinned for use in the EELS. Data was taken at low energy (<1.0eV) and momentum was scanned along three different momentum transfer directions for |q| =0.0 to 3.0Å⁻¹. The data was scaled to be Im(-1/ε). A calculation of Im(-1/ε) was performed using a tight binding model and it was found that the features associated with the Fermi surface (from this TB calculation) were too small to be seen in our spectra. We interpret this problem to be associated with the presence of thermal diffuse scattering.en
dc.description.degreePh. D.en
dc.format.extentviii, 108 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-10212005-123028en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-10212005-123028/en
dc.identifier.urihttp://hdl.handle.net/10919/40088en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V856_1992.P677.pdfen
dc.relation.isformatofOCLC# 26247987en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1992.P677en
dc.subject.lcshFermi surfacesen
dc.subject.lcshInteracting boson-fermion modelsen
dc.subject.lcshSpectrometeren
dc.subject.lcshSuperconductorsen
dc.subject.lcshThermal neutrons -- Scatteringen
dc.titleSearch for evidence of fermi surface nesting in Bi₂Sr₂Ca₁Cu₂O₈en
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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