title: Scaling of dynamics with the range of interaction in short-range attractive colloids.
abstract: We numerically study the dependence of the dynamics on the range of interaction Delta for the short-range square well potential. We find that, for small Delta, dynamics scale exactly in the same way as thermodynamics, both for Newtonian and Brownian microscopic dynamics. For interaction ranges from a few percent down to the Baxter limit, the relative location of the attractive-glass line and the liquid-gas line does not depend on Delta. This proves that, in this class of potentials, disordered arrested states (gels) can be generated only as a result of a kinetically arrested phase separation.
authors.affiliation: Dipartimento di Fisica and INFM, Università di Roma La Sapienza, P.le A. Moro 2, 00185 Roma, Italy. giuseppe.foffi@epfl.ch
authors.forename: G
authors.initials: G
authors.lastname: Foffi
authors.forename: C
authors.initials: C
authors.lastname: De Michele
authors.forename: F
authors.initials: F
authors.lastname: Sciortino
authors.forename: P
authors.initials: P
authors.lastname: Tartaglia