Asymptotic decay of liquid structure: oscillatory liquid-vapour density profiles and the Fisher-Widom line
Asymptotic decay of liquid structure: oscillatory liquid-vapour density profiles and the Fisher-Widom line
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液体结构的渐近衰变：振荡液-汽密度分布和 Fisher-Widom 线
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
Z. Sabeur
中科院分区：
文献类型：
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作者：
R. Evans;J. Henderson;D. Hoyle;A. O. Parry;Z. Sabeur
最近的工作强调了非均匀流体密度分布ρ（r）和体径向分布函数g（r）的渐近衰减的统一理论的存在。对于给定的短程原子间相互作用势，ρ（r）以与g（r）相同的方式衰减到体中，即具有相同的指数衰减长度（α0/-1），并且对于足够高的体密度（ρB）和/或温度（T），振荡波长（2π/α1）。量α0和α1由体相流体的线性稳定性分析确定;它们仅取决于体相直接相关函数。本文重新引入Fisher-Widom（FW）线的概念。这条线最初是在（ρB，T）平面上引入的，它把g（r）的纯指数衰减和指数衰减振荡衰减分开。我们探讨的FW线的形式的密度分布在液体-蒸汽界面的相关性。利用加权密度近似（WDA）密度泛函理论，我们定位FW线的…
Recent work has highlighted the existence of a unified theory for the asymptotic decay of the density profile ρ(r) of an inhomogeneous fluid and of the bulk radial distribution function g(r). For a given short-ranged interatomic potential ρ(r) decays into bulk in the same fashion as g(r), i.e. with the same exponential decay length (α0/-1) and, for sufficiently high bulk density (ρb) and/or temperature (T), oscillatory wavelength (2π/α1). The quantities α0 and α1 are determined by a linear stability analysis of the bulk fluid; they depend on only the bulk direct correlation function. In this paper we reintroduce the concept of the Fisher-Widom (FW) line. This line was originally introduced, in say the (ρb, T plane, as that which separates pure exponential from exponentially damped oscillatory decay of g(r). We explore the relevance of the FW line for the form of the density profile at a liquid-vapour interface. Using a weighted density approximation (WDA) density functional theory we locate the FW line fo...