Critical scaling in thermal systems near the zero-temperature jamming transition
Critical scaling in thermal systems near the zero-temperature jamming transition
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DOI：
10.1039/c2sm27148f
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发表时间：
2011-12
期刊：
影响因子：
3.4
通讯作者：
Lijin Wang;N. Xu
中科院分区：
文献类型：
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作者：
Lijin Wang;N. Xu
在玻璃制度的热系统，在低温下纯排斥相互作用，我们观察到两个有趣的现象与零温度（T = 0）干扰过渡。第一个是在振动态密度中存在一个平台，这是T = 0干扰跃迁的一个令人回忆的特殊振动特征。有趣的是，振动态密度的平坦化伴随着均衡性，即平均配位数等于均衡值。第二种是类似于堵塞的转变，其标志是在固定温度下，沿着压缩轨迹出现对分布函数gmax 1的第一个峰的最大高度。我们发现，gmax 1是伴随着显着的材料性能的变化，从而分为两个部分的玻璃制度和没有T = 0的干扰功能。在等静压和类干扰转变中观察到的标度律导致结构和热力学量的标度崩溃，这意味着T = 0干扰转变的临界性。动态定义的玻璃化转变，堵塞式过渡，和均衡强烈耦合的振动态密度的平坦化之间的区别表示多方面的特点排斥玻璃附近的T = 0堵塞过渡。
Within the glass regime of thermal systems with purely repulsive interactions at low temperatures, we observe two interesting phenomena associated with the zero-temperature (T = 0) jamming transition. The first one is the presence of a plateau in the density of vibrational states, a reminiscing special vibrational feature of the T = 0 jamming transition. Interestingly, the flattening of the density of vibrational states is accompanied by isostaticity, i.e. the average coordination number is equal to the isostatic value. The second one is the jamming-like transition marked by the emergence of a maximum height of the first peak of the pair distribution function, gmax1, along the trajectory of compression at a fixed temperature. We find that gmax1 is accompanied by significant change of material properties and thus divides the glass regime into two parts with and without the T = 0 jamming features. The scaling laws observed at isostaticity and jamming-like transition lead to scaling collapse of structural and thermodynamic quantities, implying criticality of the T = 0 jamming transition. The distinction between dynamically defined glass transition, jamming-like transition, and isostaticity strongly coupled with the flattening of the density of vibrational states indicate manifold characteristics of repulsive glasses near the T = 0 jamming transition.