Evidence of a Nondiffusive Transport in a Monodisperse Screened Coulomb System by a Molecular-Dynamics Simulation

Authors

Michael Wild, University of Southern Mississippi
Ras B. Pandey, University of Southern MississippiFollow

Document Type

Article

Publication Date

5-1-1993

Department

Physics and Astronomy

School

Mathematics and Natural Sciences

Abstract

A molecular-dynamics simulation is carried out for particles (tracers) interacting with a screened Coulomb potential in three dimensions. A phase transition is observed from a liquid to an fcc solid on reducing the temperature at a fixed density, consistent with previous studies. In the liquid phase, the variation of the rms displacement R_tr of the charged particles with time seems to depend on the density and the temperature. In the short-time regime, the effective exponent k for the subdiffusive power-law behavior, i.e., R_tr∼t^k, decreases on increasing the density and lowering the temperature. A crossover from subdiffusive to a diffusive behavior is observed for a wide density regime in the liquid phase. At high temperatures and large densities, a single power law does not seem to describe the variation of R_tr with t.

Comments

©Physical Review E

Publisher Version

Publication Title

Physical Review E

Volume

47

Issue

5

First Page

3246

Last Page

3250

Recommended Citation

Wild, M., Pandey, R. B. (1993). Evidence of a Nondiffusive Transport in a Monodisperse Screened Coulomb System by a Molecular-Dynamics Simulation. Physical Review E, 47(5), 3246-3250.
Available at: https://aquila.usm.edu/fac_pubs/6479