title: Phase diagram of a binary symmetric hard-core Yukawa mixture.
abstract: We assess the accuracy of the self-consistent Ornstein-Zernike approximation for a binary symmetric hard-core Yukawa mixture by comparison with Monte Carlo simulations of the phase diagrams obtained for different choices of the ratio alpha of the unlike-to-like interactions. In particular, from the results obtained at alpha=0.75 we find evidence for a critical endpoint in contrast to recent studies based on integral equation and hierarchical reference theories. The variation of the phase diagrams with range of the Yukawa potential is investigated.
authors.affiliation: Institut für Experimentalphysik, Universität Wien, Strudlhofgasse 4, A-1090 Wien, Austria.
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Schöll-Paschinger
authors.forename: Dominique
authors.initials: D
authors.lastname: Levesque
authors.forename: Jean-Jacques
authors.initials: JJ
authors.lastname: Weis
authors.forename: Gerhard
authors.initials: G
authors.lastname: Kahl