Glass formation and crystallization of a simple monatomic liquid.
Glass formation and crystallization of a simple monatomic liquid.
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简单单原子液体的玻璃形成和结晶。
DOI：
10.1103/physreve.79.051501
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
T. Odagaki
中科院分区：
文献类型：
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作者：
T. Mizuguchi;T. Odagaki
用分子动力学方法研究了具有双阱相互作用势的二维单原子系统在较宽温度范围内的动力学行为。将该体系在熔融温度以上熔融并平衡，然后以几种冷却速率将其骤冷至低于熔融温度88%的温度以产生非晶态。当系统以恒定速率加热时，测量作为温度的函数的各种热力学量。观察到的玻璃化转变的能量和玻璃化转变温度的突然增加被证明是在非晶态的制备过程中的冷却速率的增加的函数。在相对高温区，体系逐渐转变为晶体，时间-温度-转变曲线呈典型的鼻状。发现在低于熔化温度14- 15%的温度下，到结晶状态的转变时间最短，并且在足够低的温度下，在我们的模拟中，系统在观察时间内不会转变成结晶状态。这表明实现了长寿命的玻璃态。
A simple monatomic system in two dimensions with a double-well interaction potential is investigated in a wide range of temperatures by molecular-dynamics simulation. The system is melted and equilibrated well above the melting temperature, and then it is quenched to a temperature 88% below the melting temperature at several cooling rates to produce an amorphous state. Various thermodynamic quantities are measured as functions of temperature while the system is heated at a constant rate. The glass transition is observed with a sudden increase in the energy and the glass transition temperature is shown to be an increasing function of the cooling rate in the preparation process of the amorphous state. In a relatively high-temperature region, the system gradually transforms into crystals, and the time-temperature-transformation curve shows a typical nose shape. It is found that the transformation time to a crystalline state is the shortest at a temperature 14-15 % below the melting temperature and that at sufficiently low temperatures the system does not transform into a crystalline state within an observation time in our simulation. This indicates that a long-lived glassy state is realized.
DOI：
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发表时间：
2011-11
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影响因子：
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作者：
入江 正浩
通讯作者：
入江 正浩
O-Yamamuro：“玻璃态和液体甲苯和乙苯的量热研究：玻璃形成中空间异质性的热力学方法”
DOI：
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