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dc.contributor.authorMishra, S. K.eng
dc.contributor.authorZhang, Zeeng
dc.contributor.authorSatpathy, Sashi Sekhar, 1956-eng
dc.date.issued1994eng
dc.descriptiondoi:10.1063/1.358171eng
dc.description.abstractThe nature of the Verwey transition in magnetite (FqO,) within a three-band spinless model Hamiltonian is examined. These bands, which arise from the minority-spin tZg orbitals on the Fe(B) sublattice, are occupied by half an electron per Fe(B) atom. The Verwey order-disorder transition is studied as a function of the ratio of the intersite Coulomb repulsion Ur and the bandwidth W. It is found that the electrons are ordered beyond the critical value of U,lW=O.25 in essential agreement with the results of the one-band Cullen-Callen model. For larger values of lJ,JW, a Venvey-like order is exhibited where the electrons occupy alternate (001) planes. The model predicts a transition from the metallic to the semiconducting state with the band gap increasing linearly with U, beyond the transition point.eng
dc.identifier.citationJ. Appl. Phys. 76, 6700 (1994)eng
dc.identifier.issn0021-8979eng
dc.identifier.urihttp://hdl.handle.net/10355/9536eng
dc.languageEnglisheng
dc.publisherAmerican Institute of Physicseng
dc.relation.ispartofcollectionUniversity of Missouri--Columbia. College of Arts and Sciences. Department of Physics and Astronomy. Physics and Astronomy publicationseng
dc.subjectband and itinerant modelseng
dc.subject.lcshMagnetiteeng
dc.subject.lcshMetal-insulator transitionseng
dc.subject.lcshEnergy gap (Physics)eng
dc.subject.lcshMagnetism, Band theory ofeng
dc.titleVerwey transition in magnetite: Mean‐field solution of the three‐band modeleng
dc.typeArticleeng


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