Phys. Rev. Lett. 82, 3649–3652 (1999)Direct Observation of Stretched-Exponential Relaxation in Low-Temperature Lennard-Jones Systems Using the Cage Correlation FunctionReceived 7 January 1999; published in the issue dated 3 May 1999 We report on the direct observation of stretched exponential relaxation in low-temperature monatomic Lennard-Jones systems which were cooled slowly from the liquid phase to form crystals with a large number of defects. We use the cage correlation function [E. Rabani, J. D. Gezelter, and B. J. Berne, J. Chem. Phys. 107, 6867 (1997)] which measures changes in atomic surroundings to observe the stretched exponential relaxations. We obtain a distribution of hopping rates assuming that the origin of the Kohlrausch-Williams-Watts law is from static disorder in the distribution of barrier heights. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.82.3649
DOI:
10.1103/PhysRevLett.82.3649
PACS:
66.30.-h, 02.70.Ns, 31.15.Qg, 61.43.Er
See AlsoComment: U. Zürcher and T. Keyes, Comment on “Direct Observation of Stretched-Exponential Relaxation in Low-Temperature Lennard-Jones Systems Using the Cage Correlation Function”, Phys. Rev. Lett. 85, 466 (2000). Reply: Eran Rabani, J. Daniel Gezelter, and B. J. Berne, Rabani, Gezelter, and Berne Reply:, Phys. Rev. Lett. 85, 467 (2000). |
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