Rapid heating and cooling in two-dimensional Yukawa systems.
Rapid heating and cooling in two-dimensional Yukawa systems.
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DOI：
10.1103/physreve.78.026415
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发表时间：
2008-08
期刊：
影响因子：
--
通讯作者：
Yan Feng;Bin Liu;J. Goree
中科院分区：
文献类型：
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作者：
Yan Feng;Bin Liu;J. Goree
模拟研究了具有汤川粒子间势的二维系统的固体过热和液体过冷。受尘埃等离子体被加热然后突然冷却的实验的启发，我们使用朗格万动力学模拟来跟踪粒子运动。当温度在加热和冷却循环中迅速变化时，可以观察到滞后现象。在实验中，观察到瞬态固体过热，而不是液体过冷。研究发现，较高的升温速率促进了熔点以上固体结构的固体过热。
Simulations are reported to investigate solid superheating and liquid supercooling of two-dimensional systems with a Yukawa interparticle potential. Motivated by experiments where a dusty plasma is heated and then cooled suddenly, we track particle motion using a simulation with Langevin dynamics. Hysteresis is observed when the temperature is varied rapidly in a heating and cooling cycle. As in the experiment, transient solid superheating, but not liquid supercooling, is observed. Solid superheating, which is characterized by solid structure above the melting point, is found to be promoted by a higher rate of temperature increase.