Dresden 2014 – scientific programme

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DY: Fachverband Dynamik und Statistische Physik

DY 26: Focus Session: Slow Dynamics in Glasses and Granular Matter I (joint session DY/ CPP/ DF)

DY 26.6: Talk

Thursday, April 3, 2014, 11:30–11:45, HÜL 186

Glass Transition of Yukawa Systems: Crossover from Hard Sphere to Soft Sphere Limits — •Anoosheh Yazdi¹, Alexei Ivlev², Sergei Khrapak², Adam Wysocki³, Hartmut Löwen⁴, and Matthias Sperl¹ — ¹Institut für Materialphysik im Weltraum, Deutsches Zentrum fuer Luft- und Raumfahrt, 51147 Köln, Germany — ²Max-Planck-Institut für extraterrestrische Physik, 85741 Garching, Germany — ³Institute for Advanced Simulation and Institute of Complex Systems, Forschungszentrum Jülich, 52425 Jülich, Germany — ⁴Institut für Theoretische Physik II, Heinrich-Heine-Universität Düsseldorf, 85741 Düsseldorf, Germany

The mode-coupling theory for ideal glass transitions (MCT) is applied to the single and double Yukawa potential systems. Glass transition curves are obtained in the full range of two control parameters: the screening parameter κ, which is the inverse screening length, and the interparticle potential strength Γ. With increasing κ along the transition, glass form factors and effective packing fractions undergo a crossover from the one-component plasma (OCP) limit, which resembles a very soft sphere system, to a hard sphere system (HSS). The entire transition diagram can be described by analytical functions. Suprisingly and different from those of other potentials, glass transition curves are found to be shifted but otherwise identical to the melting curves in the control parameter plane.