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arXiv 1901.06159cond-mat.soft
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液态水中离子诱导溶剂极化的干涉效应

Interference effects between ion induced solvent polarisations in Liquid water

Puja Banerjee, Biman Bagchi

摘要:

我们计算了固定在水中的两个带相反电荷和相似电荷的离子之间的有效力作为分离距离R的函数。在短间距,R小于1 nm,有效力是大大不同的$1/ε_{s}R^2$的依赖性所主张的屏蔽库仑力定律(SCFL); $ε_{s}$是静态介电常数的介质。我们还发现了一个有趣的不对称力之间的+VE和-VE离子。这种故障的SCFL被证明是由于两个电荷所产生的极化之间的持续干扰,在XY模型哈密顿的涡旋-antivortex对形成类似的方式。从我们的模拟中提取的介电常数的距离依赖性,$ε_{s}$(R)表现出有趣的功能,并可用于未来的建模。

英文摘要:

We calculate the effective force between two oppositely charged and similarly charged ions fixed in water as a function of separation distance R. At short separations, R less than 1 nm, the effective force is vastly different from the $1/ε_{s}R^2$ dependence advocated by the screened Coulomb force law (SCFL); $ε_{s}$ being the static dielectric constant of the medium. We also find an interesting asymmetry in the force between +ve and -ve ions. This breakdown of SCFL is shown to be due to the persistent interference between the polarizations created by the two charges, in a manner similar to the vortex-antivortex pair formation in XY model Hamiltonian. The distance dependence of dielectric constants, $ε_{s}$(R) extracted from our simulation exhibit interesting features and can be used in future modelling.

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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