title: Colloids as model systems for liquid undercooled metals.
abstract: Charged colloidal particles interact via a hard core Yukawa potential, while isotropic Lennard-Jones-like potentials are frequently used as pair potentials in metals. We present measurements of the structure factor of shear molten monodisperse colloids and molten metals using ultrasmall-angle x-ray scattering and elastic neutron scattering, respectively. In both systems data analysis gives evidence of fivefold-symmetric short-range order becoming more pronounced with increasing deviations from equilibrium. The experiments demonstrate that in both systems topological effects control ordering in the melt state.
authors.affiliation: Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt, 51170 Köln, Germany.
authors.forename: Patrick
authors.initials: P
authors.lastname: Wette
authors.forename: Ina
authors.initials: I
authors.lastname: Klassen
authors.forename: Dirk
authors.initials: D
authors.lastname: Holland-Moritz
authors.forename: Thomas
authors.initials: T
authors.lastname: Palberg
authors.forename: Stephan V
authors.initials: SV
authors.lastname: Roth
authors.forename: Dieter M
authors.initials: DM
authors.lastname: Herlach