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          Institute: MPI für Festkörperforschung     Collection: FKF Publikationen 2006     Display Documents



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ID: 306272.0, MPI für Festkörperforschung / FKF Publikationen 2006
Mechanism of the Verwey transition in magnetite
Authors:Piekarz, P.; Parlinski, K.; Oleś, A. M.
Language:English
Date of Publication (YYYY-MM-DD):2006
Title of Journal:Physical Review Letters
Volume:97
Issue / Number:15
Sequence Number of Article:156402
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:By combining ab initio results for the electronic structure and phonon
spectrum with the group theory, we establish the origin of the Verwey
transition in Fe3O4. Two primary order parameters with X-3 and Delta(5)
symmetries are identified. They induce the phase transformation from
the high-temperature cubic to the low-temperature monoclinic structure.
The on-site Coulomb interaction U between 3d electrons at Fe ions plays
a crucial role in this transition-it amplifies the coupling of phonons
to conduction electrons and thus opens a gap at the Fermi energy.
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Festkörperforschung
External Affiliations:Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland.
; Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany.
Identifiers:ISI:000241247700048 [ID No:1]
ISSN:0031-9007 [ID No:2]
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