再论动力学介电衰减：有限离子浓度的现象学
Kinetic dielectric decrement revisited: phenomenology of finite ion concentrations
摘要：
借助于最近发展起来的非平衡方法，我们研究了离子强度对Hubbard-Onsager介电衰减的影响。我们计算的离子在氯化钠溶液中的运动所造成的水分子的去极化从稀制度（0.035 M）接近饱和浓度（4.24 M），并发现动力学减量显示出强烈的非单调行为，在现有的模型的预测相反。我们介绍了一个唯象的修改的Hubbard-Onsager连续介质理论，考虑到屏蔽由于在平均场水平的离子云，并且，能够描述的动力学衰减在高浓度，包括存在一个明显的最小值。
英文摘要：
With the help of a recently developed non-equilibrium approach, we investigate the ionic strength dependence of the Hubbard--Onsager dielectric decrement. We compute the depolarization of water molecules caused by the motion of ions in sodium chloride solutions from the dilute regime (0.035 M) up close to the saturation concentration (4.24 M), and find that the kinetic decrement displays a strong nonmonotonic behavior, in contrast to the prediction of available models. We introduce a phenomenological modification of the Hubbard--Onsager continuum theory, that takes into account the screening due to the ionic cloud at mean field level, and, is able to describe the kinetic decrement at high concentrations including the presence of a pronounced minimum.
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