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@ARTICLE{Han:836892,
author = {Han, X. J. and Li, J. G. and Schober, Herbert R.},
title = {{H}igh temperature breakdown of the {S}tokes-{E}instein
relation in a computer simulated {C}u-{Z}r melt},
journal = {The journal of chemical physics},
volume = {144},
number = {12},
issn = {0021-9606},
address = {Melville, NY},
publisher = {American Institute of Physics},
reportid = {FZJ-2017-05924},
pages = {124505},
year = {2016},
abstract = {Transport properties and the Stokes-Einstein (SE) relation
in liquid Cu8Zr3 are studied by molecular dynamics
simulation with a modified embedded atom potential. The
critical temperature Tc of mode coupling theory (MCT) is
derived as 930 K from the self-diffusion coefficient D and
viscosity η. The SE relation breaks down around TSE = 1900
K, which is far above Tc. At temperatures below TSE, the
product of D and η fluctuates around a constant value,
similar to the prediction of MCT near Tc. The influence of
the microscopic atomic motion on macroscopic properties is
investigated by analyzing the time dependent liquid
structure and the self-hole filling process. The self-holes
for the two components are preferentially filled by atoms of
the same component. The self-hole filling dynamics explains
the different breakdown behaviors of the SE relation in
Zr-rich liquid CuZr2 compared to Cu-rich Cu8Zr3. At TSE, a
kink is found in the temperature dependence of both partial
and total coordination numbers for the three atomic pair
combinations and of the typical time of self-hole filling.
This indicates a strong correlation between liquid
structure, atomic dynamics, and the breakdown of SE
relation. The previously suggested usefulness of the
parameter d(D1/D2)/dT to predict TSE is confirmed.
Additionally we propose a viscosity criterion to predict TSE
in the absence of diffusion data.},
cin = {PGI-2},
ddc = {540},
cid = {I:(DE-Juel1)PGI-2-20110106},
pnm = {144 - Controlling Collective States (POF3-144)},
pid = {G:(DE-HGF)POF3-144},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000373644400042},
pubmed = {pmid:27036459},
doi = {10.1063/1.4944081},
url = {https://juser.fz-juelich.de/record/836892},
}