Phys. Rev. Lett. 93, 156408 (2004) [4 pages]Magnetite, a Model System for Mixed-Valence Oxides, Does Not Show Charge OrderingReceived 7 April 2004; published 7 October 2004 We have investigated the charge ordering (CO) in magnetite below the Verwey transition. A new set of half-integer and mixed-integer superlattice reflections of the low-temperature phase have been studied by x-ray resonant scattering. None of these reflections show features characteristic of CO. We demonstrate the absence of CO along the c axis with the periodicity of either the cubic lattice q=(001) or the doubled cubic lattice q=(001/2). This result suggests that the Verwey transition is caused by strong electron-phonon interaction instead of an electronic ordering on the octahedral Fe atoms. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.156408
DOI:
10.1103/PhysRevLett.93.156408
PACS:
71.30.+h, 61.10.Eq, 71.90.+q
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