On the Verwey Transition in Magnetite
- 1 December 1972
- journal article
- research article
- Published by Wiley in Physica Status Solidi (b)
- Vol. 54 (2) , 463-467
- https://doi.org/10.1002/pssb.2220540210
Abstract
The Verwey transition in magnetite is investigated using a band model with interatomic Coulomb energy introduced by Cullen and Callen. This model is treated in the Hartree‐Fock approximation. A tight‐binding calculation of the band structure with Verwey ordering yields a gap in the single‐particle excitation spectrum for M = (U/2|h|) m > 1 (U Coulomb energy, h overlap integral, m ordering parameter). Below the Verwey temperature Tv semiconducting behaviour for M > 1 and a region of gapless Verwey ordering and semimetallic behaviour for 0 < M ⩽ 1 is found.Keywords
This publication has 5 references indexed in Scilit:
- A calculation of the conductivity of magnetite above the Verwey temperaturePhysics Letters A, 1972
- Band Theory of Multiple Ordering and the Metal-Semiconductor Transition in MagnetitePhysical Review Letters, 1971
- Collective Electron Theory of the Metal-Semiconductor Transition in MagnetiteJournal of Applied Physics, 1970
- Double-time Green functions in statistical physicsUspekhi Fizicheskih Nauk, 1960
- Electronic conductivity and transition point of magnetite (“Fe3O4”)Physica, 1941