Potential effects on instantaneous normal modes of liquids

Ten-Ming Wu; Wen Jong Ma; Shiow Fon Tsay

doi:10.1016/S0378-4371(98)00029-6

Potential effects on instantaneous normal modes of liquids

Ten-Ming Wu^*, Wen Jong Ma, Shiow Fon Tsay

^*Corresponding author for this work

Institute of Physics

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

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 and 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.

Original language	American English
Pages (from-to)	257-271
Number of pages	15
Journal	Physica A: Statistical Mechanics and its Applications
Volume	254
Issue number	1-2
DOIs	https://doi.org/10.1016/S0378-4371(98)00029-6
State	Published - 15 May 1998

Keywords

Instantaneous normal modes
Pair potential
Random walk

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10.1016/S0378-4371(98)00029-6

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title = "Potential effects on instantaneous normal modes of liquids",

abstract = "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 and 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.",

keywords = "Instantaneous normal modes, Pair potential, Random walk",

author = "Ten-Ming Wu and Ma, {Wen Jong} and Tsay, {Shiow Fon}",

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TY - JOUR

T1 - Potential effects on instantaneous normal modes of liquids

AU - Wu, Ten-Ming

AU - Ma, Wen Jong

AU - Tsay, Shiow Fon

PY - 1998/5/15

Y1 - 1998/5/15

N2 - 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 and 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.

AB - 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 and 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.

KW - Instantaneous normal modes

KW - Pair potential

KW - Random walk

UR - http://www.scopus.com/inward/record.url?scp=0032070112&partnerID=8YFLogxK

U2 - 10.1016/S0378-4371(98)00029-6

DO - 10.1016/S0378-4371(98)00029-6

M3 - Article

AN - SCOPUS:0032070112

SN - 0378-4371

VL - 254

SP - 257

EP - 271

JO - Physica A: Statistical Mechanics and its Applications

JF - Physica A: Statistical Mechanics and its Applications

IS - 1-2

ER -

Potential effects on instantaneous normal modes of liquids

Abstract

Keywords

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