Mean-field dynamic criticality and geometric transition in the Gaussian core model

被引:13
|
作者
Coslovich, Daniele [1 ]
Ikeda, Atsushi [2 ]
Miyazaki, Kunimasa [3 ]
机构
[1] Univ Montpellier, CNRS, Lab Charles Coulomb, UMR 5221, F-34059 Montpellier, France
[2] Kyoto Univ, Fukui Inst Fundamental Chem, Kyoto, Japan
[3] Nagoya Univ, Dept Phys, Nagoya, Aichi 464, Japan
关键词
SPATIALLY HETEROGENEOUS DYNAMICS; GLASS-TRANSITION; TEMPERATURE-DEPENDENCE; ENERGY LANDSCAPE; VISCOUS-LIQUIDS; COUPLING THEORY; GROWING LENGTH; SCALE; SIMULATIONS; MIXTURE;
D O I
10.1103/PhysRevE.93.042602
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
We use molecular dynamics simulations to investigate dynamic heterogeneities and the potential energy landscape of the Gaussian core model (GCM). Despite the nearly Gaussian statistics of particles' displacements, the GCM exhibits giant dynamic heterogeneities close to the dynamic transition temperature. The divergence of the four-point susceptibility is quantitatively well described by the inhomogeneous version of the mode-coupling theory. Furthermore, the potential energy landscape of the GCM is characterized by large energy barriers, as expected from the lack of activated, hopping dynamics, and display features compatible with a geometric transition. These observations demonstrate that all major features of mean-field dynamic criticality can be observed in a physically sound, three-dimensional model.
引用
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页数:8
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