Monte Carlo study of glassy order in two-dimensional Lennard-Jones systems
- 1 March 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 35 (7), 3506-3523
- https://doi.org/10.1103/physrevb.35.3506
Abstract
The presence of disordered states in quenched Lennard-Jones systems in two dimensions is investigated by use of Monte Carlo simulations. No glassy state is observed in the one-component Lennard-Jones system; for all the (N,V,T) ensembles studied, the quenched system evolves readily into the ordered solid. When the two-component Lennard-Jones fluid is quenched to a low temperature, depending on the ratios of the concentration / and ‘‘sizes’’ /, it may evolve into either a fairly well-ordered solid, a microcrystalline state, or a disordered solid which may or may not be glassy. The two-component glasses are highly disordered with well-localized particles and have the characteristic split-second peak in the partial pair distribution function , which is found in scattering experiments for metallic glasses and previous three-dimensional computer simulations of glasses. The authors propose that these glasses are only metastable and the phase-separated ordered lattice is the ground state. There is no hexatic order in the two-dimensional glasses; they have only short-range bond orientational correlation.
Keywords
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