Potential effects on instantaneous normal modes of liquids

被引：12

作者：

Wu, TM ^{[1
]}

Ma, WJ

Tsay, SF

机构：

[1] Natl Tsing Hua Univ, Inst Phys, Hsinchu 300, Taiwan

[2] Natl Sun Yat Sen Univ, Dept Phys, Kaohsiung 80424, Taiwan

来源：

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS | 1998年 / 254卷 / 1-2期

关键词：

instantaneous normal modes; pair potential; random walk;

D O I：

10.1016/S0378-4371(98)00029-6

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We calculated the instantaneous-normal-mode (INM) densities of states for liquid Na, Lennard-Jones (LJ) liquid and truncated LJ liquid with the same reduced density and temperature by both molecular-dynamics simulation and the vector-random-walk approach under two-body approximation. By comparing the calculated results for these three liquids, we give some physical insights in the relationship between the INM density of state acid the two-particle interaction potential. The effects of the short-range repulsive core, the long-range tail in the potential and the presence of attractive well are elucidated. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：257 / 271

页数：15

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