DOI: 10.1063/1.480541. Time-dependent, four-point density correlation function description of dynamical heterogeneity and decoupling in supercooled liquids

Time-dependent, four-point density correlation function description of dynamical heterogeneity and decoupling in supercooled liquids

10.1063/1.480541

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

Dynamical heterogeneity and the decoupling of diffusion and relaxation in a supercooled liquid is investigated via a time-dependent, four-point density correlation function. We show that the main contribution to the corresponding generalized susceptibility χ4(t) in a molecular dynamics simulation of a Lennard-Jones liquid arises from spatial correlations between temporarily localized (“caged”) particles. By comparing χ4(t) with a generalized susceptibility χM(t) related to a correlation function for the squared particle displacements, we demonstrate a connection between dynamical heterogeneity and the decoupling of relaxation and diffusion.

Bibliography

Glotzer, S. C., Novikov, V. N., & SchrÃ¸der, T. B. (2000). Time-dependent, four-point density correlation function description of dynamical heterogeneity and decoupling in supercooled liquids. The Journal of Chemical Physics, 112(2), 509â512.

Authors 3

Sharon C. Glotzer (first)
Vladimir N. Novikov (additional)
Thomas B. Schrøder (additional)

References 49 Referenced 211

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Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 8:27 a.m.)
Deposited	1 year, 6 months ago (Feb. 6, 2024, 10:46 a.m.)
Indexed	3 weeks, 4 days ago (Aug. 6, 2025, 9:22 a.m.)
Issued	25 years, 7 months ago (Jan. 8, 2000)
Published	25 years, 7 months ago (Jan. 8, 2000)
Published Print	25 years, 7 months ago (Jan. 8, 2000)

Funders 0

None

BibTeX

@article{Glotzer_2000, title={Time-dependent, four-point density correlation function description of dynamical heterogeneity and decoupling in supercooled liquids}, volume={112}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.480541}, DOI={10.1063/1.480541}, number={2}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Glotzer, Sharon C. and Novikov, Vladimir N. and Schrøder, Thomas B.}, year={2000}, month=jan, pages={509–512} }

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