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Properties of the energy landscape of network models for covalent glasses

J. Christian Schoen·Paolo Sibani
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Abstract

We investigate the energy landscape of two dimensional network models for covalent glasses by means of the lid algorithm. For three different particle densities and for a range of network sizes, we exhaustively analyse many configuration space regions enclosing deep-lying energy minima. We extract the local densities of states and of minima, and the number of states and minima accessible below a certain energy barrier, the 'lid'. These quantities show on average a close to exponential growth as a function of their respective arguments. We calculate the configurational entropy for these pockets of states and find that the excess specific heat exhibits a peak at a critical temperature associated with the exponential growth in the local density of states, a feature of the specific heat also observed in real glasses at the glass transition.

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J. Christian Schoen, Paolo Sibani. 1998-05-29. Properties of the energy landscape of network models for covalent glasses. https://doi.org/10.1088/0305-4470%2F31%2F40%2F011

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