Thermodynamics of entropy-driven phase transformations
journal contributionposted on 26.04.2006 by A. Radosz, K. Ostasiewicz, P. Magnuszewski, J. Damczyk, L. Radosiński, F.V. Kusmartsev, J.H. Samson
Any type of content formally published in an academic journal, usually following a peer-review process.
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.