Peng, H. L. and Schober, H. R. and Voigtmann, Th. (2016) Velocity autocorrelation function in supercooled liquids: Long-time tails and anomalous shear-wave propagation. Physical Review E, 94, 060601(R). American Physical Society. doi: 10.1103/PhysRevE.94.0606. ISSN 2470-0045.
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Abstract
Molecular dynamic simulations are performed to reveal the long-time behavior of the velocity autocorrelation function (VAF) by utilizing the finite-size effect in a Lennard-Jones binary mixture. Whereas in normal liquids the classical positive t−3/2 long-time tail is observed, we find in supercooled liquids a negative tail. It is strongly influenced by the transfer of the transverse current wave across the period boundary. The t−5/2 decay of the negative long-time tail is confirmed in the spectrum of VAF. Modeling the long-time transverse current within a generalized Maxwell model, we reproduce the negative long-time tail of the VAF, but with a slower algebraic t−2 decay.
Item URL in elib: | https://elib.dlr.de/110080/ | ||||||||||||
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Document Type: | Article | ||||||||||||
Title: | Velocity autocorrelation function in supercooled liquids: Long-time tails and anomalous shear-wave propagation | ||||||||||||
Authors: |
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Date: | 2016 | ||||||||||||
Journal or Publication Title: | Physical Review E | ||||||||||||
Refereed publication: | Yes | ||||||||||||
Open Access: | No | ||||||||||||
Gold Open Access: | No | ||||||||||||
In SCOPUS: | Yes | ||||||||||||
In ISI Web of Science: | Yes | ||||||||||||
Volume: | 94 | ||||||||||||
DOI: | 10.1103/PhysRevE.94.0606 | ||||||||||||
Page Range: | 060601(R) | ||||||||||||
Publisher: | American Physical Society | ||||||||||||
ISSN: | 2470-0045 | ||||||||||||
Status: | Published | ||||||||||||
Keywords: | glass transition, velocity autocorrelation function, long time tails | ||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||
HGF - Program: | Space | ||||||||||||
HGF - Program Themes: | Research under Space Conditions | ||||||||||||
DLR - Research area: | Raumfahrt | ||||||||||||
DLR - Program: | R FR - Research under Space Conditions | ||||||||||||
DLR - Research theme (Project): | R - Vorhaben Materialwissenschaftliche Forschung (old) | ||||||||||||
Location: | Köln-Porz | ||||||||||||
Institutes and Institutions: | Institute of Materials Physics in Space | ||||||||||||
Deposited By: | Voigtmann, Dr.rer.nat. Thomas | ||||||||||||
Deposited On: | 02 Jan 2017 07:14 | ||||||||||||
Last Modified: | 17 Mar 2021 13:40 |
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