RT journal article
T1 Freezing in the presence of disorder: A lattice study
A1 Schmidt, Matthias
A1 Lafuente Molinero, Luis
A1 Cuesta, José A.
A2 Matemáticas
AB We investigate the freezing transition in a two-dimensional lattice model of annealed hard squares that are subject to the influence of randomly placed quenched particles of the same size. The latter model is a porous medium. By combining two recent density functional approaches we arrive at a theory for quenched-annealed lattice fluids that treats the quenched particles on the level of their one-body density distribution. We show that this approach yields thermodynamics that compare well with results from treating matrix realizations explicitly and performing subsequent averaging over the disorder. The freezing transition from a fluid to a columnar phase is found to be continuous. On increasing matrix density it shifts towards close packing and vanishes beyond a threshold matrix density.
PB Institute of Physics Publisihing
SN 0953-8984
YR 2003
FD 2003-06-27
LK http://hdl.handle.net/10498/30857
UL http://hdl.handle.net/10498/30857
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 09-may-2026