Title
Crystal field, orientational order, and lattice contraction in solid <tex>$C_{60}$</tex> Crystal field, orientational order, and lattice contraction in solid <tex>$C_{60}$</tex>
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
New York, N.Y. ,
Subject
Physics
Source (journal)
The journal of chemical physics. - New York, N.Y.
Volume/pages
101(1994) , p. 1435-1443
ISSN
0021-9606
ISI
A1994NW97900058
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
A model of the intermolecular potential in solid C-60, which is based on Born-Mayer repulsions, van der Waals attractions, and electrostatic multipoles, is presented. The potential is expanded in terms of multipolar rotator functions. The orientation-orientation interaction and the crystal field are calculated. The orientational phase transition to the Pa3 phase is studied with the methods of statistical mechanics. The discontinuity of the order parameter at the transition and the temperature evolution of the order parameter are calculated. The lattice contraction at the phase transition is evaluated. The influence of the lattice contraction on the crystal field and on the orientational order is studied.
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