Dipole time correlation functions of the Stockmayer fluid in the microcanonical and canonical ensembles
Payne, Vilia Ann, Forsyth, Maria, Kolafa, Jiri, Ratner, Mark A. and de Leeuw, Simon W. 1993, Dipole time correlation functions of the Stockmayer fluid in the microcanonical and canonical ensembles, Journal of physical chemistry B : condensed matter, materials, surfaces, interfaces and biophysical, vol. 97, no. 40, pp. 10478-10485, doi: 10.1021/j100142a035.
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Title
Dipole time correlation functions of the Stockmayer fluid in the microcanonical and canonical ensembles
Journal of physical chemistry B : condensed matter, materials, surfaces, interfaces and biophysical
Volume number
97
Issue number
40
Start page
10478
End page
10485
Publisher
American Chemical Society
Place of publication
Washington, D.C.
Publication date
1993-10
ISSN
1520-6106 1520-5207
Summary
Computer simulations of Stockmayer fluids were performed to generate dipole time correlation functions (TCF) at three temperatures and three dipole moments in both the microcanonical and canonical ensembles. The effect of Nosé constant-temperature dynamics on time-dependent quantities is discussed, and empirical results are given to show that the choice of thermal inertia parameter influences the speed with which a system moves through its phase space. The time correlation functions from the simulations were analyzed in terms of current theories for dipolar systems. A functional form is proposed to cover both the longtime and short-time behavior of the time correlation functions of dipoles. The relationship between this functional form and the dielectric function of the Stockmayer system is also discussed.
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