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Computer investigation of the energy landscape of amorphous silica

Philippe Jund·Remi Jullien
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Abstract

The multidimensional topography of the collective potential energy function of a so-called strong glass former (silica) is analyzed by means of classical molecular dynamics calculations. Features qualitatively similar to those of fragile glasses are recovered at high temperatures : in particular an intrinsic characteristic temperature $T_c\simeq 3500$K is evidenced above which the system starts to investigate non-harmonic potential energy basins. It is shown that the anharmonicities are essentially characterized by a roughness appearing in the potential energy valleys explored by the system for temperatures above $T_c$.

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Philippe Jund, Remi Jullien. 1999-07-29. Computer investigation of the energy landscape of amorphous silica. https://doi.org/10.1103/physrevlett.83.2210

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