A comparison of dynamic properties of a core-softened system of particles across glass transition, melting and random tiling formation

ABSTRACT

Solid structures with different types of ordering (crystals, random tilings and glasses) are considered. We show that the short-range order structure of random tilings characterised by radial distribution functions looks very similar to the ones of glasses. However, the dynamical properties of random tilings look qualitatively identical to the ones of crystals. Because of this basing on radial distribution functions, only the system can be erroneously identified as glass or as random tiling. However, combining it with the dynamical properties, such as mean square displacement of stress autocorrelation function one can unambiguously distinguish glass and random tiling structure.

KEYWORDS:

• Glass transition
• quasicrystal
• crystallization
• structure
• dynamic properties
• viscosity

Disclosure statement

No potential conflict of interest was reported by the author.

Additional information

Funding

This work was carried out using computing resources of the federal collective usage centre 'Complex for simulation and data processing for mega-science facilities' at NRC 'Kurchatov Institute', http://ckp.nrcki.ru, and supercomputers at Joint Supercomputer Center of the Russian Academy of Sciences (JSCC RAS). The work was supported by the Russian Foundation of Basic Research (Grant No 18-02-00981).