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摘要翻译：
本文对粒子与Yukawa势相互作用的二维胶体晶体熔化过程进行了布朗动力学模拟。在Yukawa体系中计算了对关联函数和键取向关联函数。观察到键取向相关函数的代数衰减。排除共存区后，汤川系中只存在一个不稳定的六相。但我们的工作表明，汤川系的熔化是两阶段熔化，不符合KTHNY理论，并且发现了各向同性液体和六相共存区。我们还研究了二维Yukawa系统中的点缺陷。
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英文标题：
《Coexistence of hexatic and isotropic phases in two-dimensional Yukawa
systems》
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作者：
Wei-Kai Qi, Shao-Meng Qin, Xiao-Ying Zhao, and Yong Chen
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最新提交年份：
2008
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分类信息：
一级分类：Physics 物理学
二级分类：Soft Condensed Matter 软凝聚态物质
分类描述：Membranes, polymers, liquid crystals, glasses, colloids, granular matter
膜，聚合物，液晶，玻璃，胶体，颗粒物质
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一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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英文摘要：
We have performed Brownian dynamics simulations on melting of two-dimensional colloidal crystal in which particles interact with Yukawa potential. The pair correlation function and bond-orientational correlation function was calculated in the Yukawa system. An algebraic decay of the bond orientational correlation function was observed. By ruling out the coexistence region, only a unstable hexatic phase was found in the Yukawa systems. But our work shows that the melting of the Yukawa systems is a two-stage melting not consist with the KTHNY theory and the isotropic liquid and the hexatic phase coexistence region was found. Also we have studied point defects in two-dimensional Yukawa systems.
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PDF链接：
https://arxiv.org/pdf/709.2035
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