This title appears in the Scientific Report :
2017
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevE.94.060601 in citations.
Please use the identifier: http://hdl.handle.net/2128/15145 in citations.
Velocity autocorrelation function in supercooled liquids: Long-time tails and anomalous shear-wave propagation
Velocity autocorrelation function in supercooled liquids: Long-time tails and anomalous shear-wave propagation
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...
Saved in:
Personal Name(s): | Peng, H. L. (Corresponding author) |
---|---|
Schober, H. R. / Voigtmann, Th. | |
Contributing Institute: |
Theoretische Nanoelektronik; PGI-2 JARA - HPC; JARA-HPC |
Published in: | Physical review / E, 94 (2016) 6, S. 060601 (R) |
Imprint: |
Woodbury, NY
Inst.
2016
|
DOI: |
10.1103/PhysRevE.94.060601 |
Document Type: |
Journal Article |
Research Program: |
Dynamics of glasses and their melts Controlling Collective States |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/15145 in citations.
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. |