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Energy landscapes for a modified repulsive Weeks–Chandler–Andersen potential

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Peer-reviewed

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Article

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Abstract

Abstract: The short-range nature of the repulsive Weeks–Chandler–Anderson (WCA) potential can create free particles/rattlers in a condensed system. The presence of rattlers complicates the analysis of the energy landscape due to extra zero-frequency normal modes. By employing a long-range Gaussian tail modification, we remove the rattlers without changing the structure and the dynamics of the system, and successfully describe the potential energy landscape in terms of minima and transition states. This coarse-grained description of the landscape and the dynamical properties of the modified potential exhibit characteristic signatures of glass-forming liquids. However, we show that despite having qualitatively similar behaviour, the modified WCA potential is less frustrated compared to its attractive counterpart.

Description

Funder: Engineering and Physical Sciences Research Council; doi: https://doi.org/10.13039/501100000266

Keywords

Paper, Women in Computational Condensed Matter Physics, energy landscape, supercooled liquid, glass, structure dynamics, dis-connectivity graph

Journal Title

Journal of Physics: Condensed Matter

Conference Name

Journal ISSN

0953-8984
1361-648X

Volume Title

34

Publisher

IOP Publishing