title: Type-IV phase behavior in fluids with an internal degree of freedom.
abstract: We have identified a fourth archetype of phase diagram in binary symmetrical mixtures, which is encountered when the ratio of the interaction between the unlike and the like particles is sufficiently small. This type of phase diagram is characterized by the fact that the lambda line (i.e., the line of the second-order demixing transition) intersects the first-order liquid-vapor curve at densities smaller than the liquid-vapor critical density.
authors.affiliation: Institut für Experimentalphysik, Universität Wien, Boltzmanngasse 5, A-1090 Wien, Austria.
authors.forename: Elisabeth
authors.initials: E
authors.lastname: Schöll-Paschinger
authors.forename: Gerhard
authors.initials: G
authors.lastname: Kahl