Novel phase behavior in quantum rotors

A system of quantum linear rotors in a crystal field is found to display a novel type of phase diagram. At a certain value of the crystal field a discontinuity point appears at the orientational phase transition line. As the crystal field increases this point splits into two critical points with a s...

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Bibliographic Details
Published in:Journal of low temperature physics 2003-11, Vol.133 (3-4), p.251-260
Main Authors: FREIMAN, Y. A, TRETYAK, S. M, ANTSYGINA, T. N, HEMLEY, R. J
Format: Article
Language:English
Subjects:
Critical point phenomena
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Materials science
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Statistical physics, thermodynamics, and nonlinear dynamical systems
Thermodynamics
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Summary:A system of quantum linear rotors in a crystal field is found to display a novel type of phase diagram. At a certain value of the crystal field a discontinuity point appears at the orientational phase transition line. As the crystal field increases this point splits into two critical points with a single-phase-state discontinuity ("hole") between them. This remarkable feature is common both for a system where all angular momentum states are allowed and for one where the angular momentum is restricted to have even values despite the fact that general aspects of the transformations induced by the crystal field differ considerably for the two systems.
ISSN:0022-2291
1573-7357
DOI:10.1023/A:1026031107293