Multiple reentrant glass transitions of soft spheres at high densities: monotonicity of the curves of constant relaxation time in jamming phase diagrams depending on temperature over pressure and pressure.
Multiple reentrant glass transitions of soft spheres at high densities: monotonicity of the curves of constant relaxation time in jamming phase diagrams depending on temperature over pressure and pressure.
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DOI：
10.1103/physreve.87.052310
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发表时间：
2013-05
期刊：
影响因子：
--
通讯作者：
M. Schmiedeberg
中科院分区：
文献类型：
--
作者：
M. Schmiedeberg
通过分子动力学模拟，我们确定了软球的双分散混合物在高密度下的干扰相图，这些混合软球按照排斥的幂定律对势相互作用。我们观察到，在恒温下，弛豫时间作为密度的函数而非单调变化。因此，如果使用温度和密度作为控制参数，则干扰相图包含多个重入玻璃化转变。然而，如果我们考虑一种新的干扰相图公式，其中使用温度过压和压力作为控制参数，则没有观察到非单调行为。
By using molecular-dynamics simulations, we determine the jamming phase diagrams at high densities for a bidisperse mixture of soft spheres that interact according to repulsive power-law pair potentials. We observe that the relaxation time varies nonmonotonically as a function of density at constant temperature. Therefore, the jamming phase diagrams contain multiple reentrant glass transitions if temperature and density are used as control parameters. However, if we consider a new formulation of the jamming phase diagrams where temperature over pressure and pressure are employed as control parameters, no nonmonotonic behavior is observed.