Glassy dynamics in monodisperse hard ellipsoids
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We present evidence from computer simulations for glassy dynamics in suspensions of monodisperse hard ellipsoids. In equilibrium, almost spherical ellipsoids show a first order transition from an isotropic phase to a rotator phase. When overcompressing the isotropic phase into the rotator regime, we observe super-Arrhenius slowing down of diffusion and relaxation, accompanied by two-step relaxation in positional and orientational correlators. The effects are strong enough for asymptotic laws of mode-coupling theory to apply. Glassy dynamics are unusual in monodisperse systems. Typically, polydispersity in size or a mixture of particle species is prerequisite to prevent crystallization. Here, we show that a slight particle anisometry acts as a sufficient source of disorder. This sheds new light on the question of which ingredients are required for glass formation.
included data of prolate system in all figures and text, extended discussion of indicators of glassy dynamics, fixed symbol ambiguities, preprint format
included data of prolate system in all figures and text, extended discussion of indicators of glassy dynamics, fixed symbol ambiguities, preprint format