Dynamical Heterogeneities in a Supercooled Lennard-Jones Liquid

by: Walter Kob, Claudio Donati, Steven J Plimpton, Peter H Poole, Sharon C Glotzer

Physical Review Letters, Vol. 79 (13 October 1997), 2827.

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Abstract

We present the results of a molecular dynamics computer simulation study in which we investigate whether a supercooled Lennard-Jones liquid exhibits dynamical heterogeneities. We evaluate the non-Gaussian parameter for the self part of the van Hove correlation function and use it to identify “mobile” particles. We find that these particles form clusters whose sizes grow with decreasing temperature. We also find that the relaxation time of the mobile particles is significantly shorter than that of the average particle; and that this difference increases with decreasing temperature.

@article{citeulike:1304861, abstract = {We present the results of a molecular dynamics computer simulation study in which we investigate whether a supercooled Lennard-Jones liquid exhibits dynamical heterogeneities. We evaluate the non-Gaussian parameter for the self part of the van Hove correlation function and use it to identify “mobile” particles. We find that these particles form clusters whose sizes grow with decreasing temperature. We also find that the relaxation time of the mobile particles is significantly shorter than that of the average particle; and that this difference increases with decreasing temperature.}, author = {Kob, Walter and Donati, Claudio and Plimpton, Steven J. and Poole, Peter H. and Glotzer, Sharon C. }, citeulike-article-id = {1304861}, doi = {10.1103/PhysRevLett.79.2827}, journal = {Physical Review Letters}, keywords = {glass, simulation}, month = {October}, pages = {2827+}, posted-at = {2008-06-02 05:20:59}, priority = {0}, publisher = {American Physical Society}, title = {Dynamical Heterogeneities in a Supercooled Lennard-Jones Liquid}, url = {http://dx.doi.org/10.1103/PhysRevLett.79.2827}, volume = {79}, year = {1997} }

RIS record

TY - JOUR ID - citeulike:1304861 L3 - citeulike-article-id:1304861 TI - Dynamical Heterogeneities in a Supercooled Lennard-Jones Liquid JF - Physical Review Letters VL - 79 SP - 2827 PB - American Physical Society N2 - We present the results of a molecular dynamics computer simulation study in which we investigate whether a supercooled Lennard-Jones liquid exhibits dynamical heterogeneities. We evaluate the non-Gaussian parameter for the self part of the van Hove correlation function and use it to identify “mobile” particles. We find that these particles form clusters whose sizes grow with decreasing temperature. We also find that the relaxation time of the mobile particles is significantly shorter than that of the average particle; and that this difference increases with decreasing temperature. KW - glass KW - simulation AU - Kob, Walter AU - Donati, Claudio AU - Plimpton, Steven AU - Poole, Peter AU - Glotzer, Sharon PY - 1997/10/13/ UR - http://dx.doi.org/10.1103/PhysRevLett.79.2827 ER -

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