Molecular Dynamics Simulation on a Metallic Glass Ni${}_{0.2}$Zr${}_{0.8}$-System: Non-Ergodicity Parameter

Abstract

At the present paper we have computed non-ergodicity paramater from Molecular Dynamics (MD) Simulation data after the mode-coupling theory (MCT) for a glass transition. MCT of dense liquids marks the dynamic glass-transition through a critical temperature $T_c$ that is reflected in the temperature-dependence of various physical quantities. Here, molecular dynamics simulations data of a model adapted to Ni${}_{0.2}$Zr${}_{0.8}$ are analyzed to deduce $T_c$ from the temperature-dependence of corresponding quantities and to check the consistency of the statements. Analyzed is the diffusion coefficients. The resulting values agree well with the critical temperature of the non-vanisihing non-ergodicity parameter determined from the structure factors in the asymptotic solution of the mode-coupling theory with memory-kernels in ``One-Loop'' approximation.

7 pages, 5 figures, revtex4