title: Melting of crystals in two dimensions.
abstract: While the melting of crystals is in general not understood in detail on a microscopic scale, there is a microscopic theory for a class of two-dimensional crystals, which is based on the formation and unbinding of topological defects. Herein, we review experimental work on a colloidal two-dimensional model system with tunable interactions that has given the first conclusive evidence for the validity of this theory on a microscopic level. Furthermore, we show how the mechanism of melting depends on the particle interaction and that a strong anisotropy of the interaction leads to a changed melting scenario.
authors.affiliation: Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institut, 5232 Villigen PSI, Switzerland. urs.gasser@psi.ch
authors.forename: Urs
authors.initials: U
authors.lastname: Gasser
authors.forename: Christoph
authors.initials: C
authors.lastname: Eisenmann
authors.forename: Georg
authors.initials: G
authors.lastname: Maret
authors.forename: Peter
authors.initials: P
authors.lastname: Keim