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Tracking the effects of rigidity percolation down to the liquid state: relaxational dynamics of binary chalcogen melts

AuthorsBermejo, Francisco Javier ; Cabrillo García, Carlos ; Bychkov, E.; Fouquet, P.; Ehlers, G.; Häussler, W.; Price, D.L.; Saboungi, Marie Louise
KeywordsDiffusion and ionic conduction in liquids
Studies of thermodynamic properties of specific liquids
Thermal conduction in nonmetallic liquids
Nonelectronic thermal conduction and heat-pulse propagation in solids
Issue Date20-Jun-2008
PublisherAmerican Physical Society
CitationPhysical Review. Letters 100 (24) 245902 (2008)
AbstractThe stochastic dynamics of binary liquids with formula AxB1-x, x=0–0.4 is investigated by neutron spin-echo spectroscopy. These compositions comprise samples of varying chemical connectivity, ranging from twofold-coordinated liquid Se to higher average coordinated As2S3. The parameters giving the temperature dependence of the relaxation patterns show a quasilinear dependence on the average coordination number. The results thus extend the validity of the rigidity concept into the normal liquid state and emphasize the role played by the fine details of atomic bonding on the dynamics at 10 ps–1 ns scales.
Description4 pags. ; 4 figs.
Publisher version (URL)http://link.aps.org/doi/10.1103/PhysRevLett.100.245902
Appears in Collections:(CFMAC-IEM) Artículos
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