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 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.
Radosz
A
A
Institute of Physics, Wrocław University of Technology, 50-370 Wrocław, Poland.
Ostasiewicz
K
K
Magnuszewski
P
P
Damczyk
J
J
Radosiński
Ł
Ł
Kusmartsev
F V
FV
Samson
J H
JH
Mituś
A C
AC
Pawlik
G
G