title: Experimental realization of a model glass former in 2D.
abstract: We have studied binary two-dimensional (2D) mixtures of superparamagnetic colloidal particles interacting through magnetic dipole moments, which were induced by an external magnetic field B. By tuning B the effective system temperature could be widely adjusted. Time-dependent particle coordinates measured by video-microscopy provide radial pair-distribution functions, mean-square displacements as well as evidence for heterogeneous dynamics. Characteristic features of 3D glass formers are observed experimentally in 2D for the first time.
authors.affiliation: Department of Physics, University of Konstanz, 78457, Konstanz, Germany. koenigh@uni-mainz.de
authors.forename: H
authors.initials: H
authors.lastname: König
authors.forename: R
authors.initials: R
authors.lastname: Hund
authors.forename: K
authors.initials: K
authors.lastname: Zahn
authors.forename: G
authors.initials: G
authors.lastname: Maret