Journal Article

FZJ-2017-05925

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Velocity autocorrelation function in supercooled liquids: Long-time tails and anomalous shear-wave propagation

Peng, H. L. (Corresponding author) ; Schober, H. R.FZJ* ; Voigtmann, T.

2016
Inst. Woodbury, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/15145  doi:10.1103/PhysRevE.94.060601

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.

Note: Web-Year 2016

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Contributing Institute(s):

1. Theoretische Nanoelektronik (PGI-2)
2. JARA - HPC (JARA-HPC)

Research Program(s):

1. 144 - Controlling Collective States (POF3-144) (POF3-144)
2. Dynamics of glasses and their melts (jiff07_20160501) (jiff07_20160501)

Appears in the scientific report 2017

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Database coverage:
; ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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