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arXiv 1912.02243cond-mat.stat-mech
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二维库仑流体中的电场涨落

Electric field fluctuations in the two-dimensional Coulomb fluid

Callum Gray, Steven T. Bramwell, Peter C. W. Holdsworth

摘要:

模拟了二维库仑流体中电场关联的结构因子,并与介电函数理论进行了比较。奇异的结构因子的变化发生在BKT绝缘体到导体的过渡,以及在一个更高的温度之间的相关过渡不良电解质和扰动德拜-休克尔流体。结构因素被发现不同的正则和巨正则系综,与穷人的电解质显示完整的系综不等价。我们确定机制的“欠屏蔽”和“夹点”散射相关的离子液体和人工自旋冰的实验分别。

英文摘要:

The structure factor for electric field correlations in the two dimensional Coulomb fluid is simulated and compared to theories of the dielectric function. Singular changes in the structure factor occur at the BKT insulator to conductor transition, as well as at a higher temperature correlation transition between a poor electrolyte and perturbed Debye-Hückel fluid. Structure factors are found to differ in the canonical and grand canonical ensembles, with the poor electrolyte showing full ensemble inequivalence. We identify mechanisms of `underscreening' and `pinch point' scattering that are relevant to experiments on ionic liquids and artificial spin ice respectively.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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