Thermodynamics of entropy-driven phase transformations

Thermodynamic properties of one-dimensional lattice models exhibiting entropy-driven phase transformations are discussed in quantum and classical regimes. Motivated by the multistability of compounds exhibiting photoinduced phase transitions, we consider systems with asymmetric, double, and triple w...

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Bibliographic Details
Published in:Physical review. E, Statistical, nonlinear, and soft matter physics Statistical, nonlinear, and soft matter physics, 2006-02, Vol.73 (2 Pt 2), p.026127-026127, Article 026127
Main Authors: Radosz, A, Ostasiewicz, K, Magnuszewski, P, Damczyk, J, Radosiński, Ł, Kusmartsev, F V, Samson, J H, Mituś, A C, Pawlik, G
Format: Article
Language:English
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Summary:Thermodynamic properties of one-dimensional lattice models exhibiting entropy-driven phase transformations are discussed in quantum and classical regimes. Motivated by the multistability of compounds exhibiting photoinduced phase transitions, we consider systems with asymmetric, double, and triple well on-site potential. One finds that among a variety of regimes, quantum versus classical, discrete versus continuum, a key feature is asymmetry distinguished as a "shift" type and "shape" type in limiting cases. The behavior of the specific heat indicates one phase transformation in a "shift" type and a sequence of two phase transformations in "shape"-type systems. Future analysis in higher dimensions should allow us to identify which of these entropy-driven phase transformations would evolve into phase transitions of the first order.
ISSN:1539-3755
1550-2376
DOI:10.1103/PhysRevE.73.026127