论文标题
在复杂的等离子体单层晶体中对一阶相变的实验观察
Experimental observation of a first order phase transition in a complex plasma mono-layer crystal
论文作者
论文摘要
研究了DC发光放电氩等离子体中单层带电的灰尘颗粒晶体的形成和熔化。从库仑耦合参数，灰尘温度，结构阶参数和磁滞行为的存在中，建立了熔化/形成过程的性质作为一阶相变。我们的实验结果与基于KTHNY机制或晶界诱导的熔融的2D晶体的现有理论预测明显不同，并指示了一种与波动诱导的一阶相变的新型机制，在复杂的等离子体中未曾观察到的一阶相变。
The formation and melting of a mono-layered charged dust particle crystal in a DC glow discharge Argon plasma is studied. The nature of the melting/formation process is established as a first order phase transition from the nature of the variations in the Coulomb coupling parameter, the dust temperature, the structural order parameter and from the existence of a hysteresis behavior. Our experimental results are distinctly different from existing theoretical predictions for 2D crystals based on the KTHNY mechanism or the Grain boundary induced melting and indicate a novel mechanism that is akin to a fluctuation induced first order phase transition that has not been observed before in complex plasmas.
