Critical behavior of symmetrical fluid mixtures in random pores.
We study the liquid-liquid demixing of a binary mixture with a symmetrical coupling to the quenched disorder by means of computer simulation. The critical point in the thermodynamic limit is estimated both by assuming the knowledge of the critical exponents and independently of them. The finite-size scaling analysis of the susceptibilities and the values of the critical amplitudes show that the universality class of the fluid mixture is compatible with the diluted quenched-Ising model. Our findings extend the class of systems exhibiting the same critical behavior of diluted antiferromagnets.
De Sanctis Lucentini
Pier Giorgio
PG
Dipartimento di Fisica, Università degli Studi di Roma, Piazzale Aldo Moro 2, 00185 Roma, Italy. pier.giorgio.desanctislucentini@roma1.infn.it
Pellicane
Giuseppe
G