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28 March 2024
 
  » arxiv » cond-mat/0101055

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Channel diffusion of sodium in a silicate glass
Philippe Jund ; Walter Kob ; Remi Jullien ;
Date 5 Dec 2000
Journal Phys. Rev. B 64, 134303 (2001)
Subject Statistical Mechanics; Disordered Systems and Neural Networks | cond-mat.stat-mech cond-mat.dis-nn
AffiliationLab. des Verres, Universite Montpellier II
AbstractWe use classical molecular dynamics simulations to study the dynamics of sodium atoms in amorphous Na$_2$O-4SiO$_2$. We find that the sodium trajectories form a well connected network of pockets and channels. Inside these channels the motion of the atoms is not cooperative but rather given by independent thermally activated hops of individual atoms between the pockets. By determining the probability that an atom returns to a given starting site, we show that such events are not important for the dynamics of this system.
Source arXiv, cond-mat/0101055
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