dc.contributor.author | Mishra, S. K. | eng |
dc.contributor.author | Zhang, Ze | eng |
dc.contributor.author | Satpathy, Sashi Sekhar, 1956- | eng |
dc.date.issued | 1994 | eng |
dc.description | doi:10.1063/1.358171 | eng |
dc.description.abstract | The 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.citation | J. Appl. Phys. 76, 6700 (1994) | eng |
dc.identifier.issn | 0021-8979 | eng |
dc.identifier.uri | http://hdl.handle.net/10355/9536 | eng |
dc.language | English | eng |
dc.publisher | American Institute of Physics | eng |
dc.relation.ispartofcollection | University of Missouri--Columbia. College of Arts and Sciences. Department of Physics and Astronomy. Physics and Astronomy publications | eng |
dc.subject | band and itinerant models | eng |
dc.subject.lcsh | Magnetite | eng |
dc.subject.lcsh | Metal-insulator transitions | eng |
dc.subject.lcsh | Energy gap (Physics) | eng |
dc.subject.lcsh | Magnetism, Band theory of | eng |
dc.title | Verwey transition in magnetite: Mean‐field solution of the three‐band model | eng |
dc.type | Article | eng |