Collective Motion in Liquid Silver Chalcogenides

A hydrodynamic model for the collective motion in Ag–Cu–Se

“…We can see that the calculated conductivity exhibit a minimum value around x=0.5. The calculation based on the Multi-Component Lattice Gas Model gives the same behavior [11]. For the purpose of comparison, the composition dependence of the ionic conductivity measured experimentally in the solid phase [12] is shown in the inset of Fig.…”

“…By using the above set of equations, the dielectric function and the dispersion relation of the system can be derived. The detail of the derivation is given elsewhere [9][10][11].…”

“…By using the model, it has been shown that the model reproduces quite well the composition dependence of the sound velocity and diffusion coefficient in liquid Ag 2+δ Se observed experimentally. The longitudinal and transverse collective modes in the same system have been also studied in detail [11].…”

A model for the anomalous electronic properties in liquid silver chalcogenides

“…Based on the observations that superionic conductors such as silver chalcogenides exhibit an intermediate behavior between solids and liquids, the interpenetrating two fluid model for the superionic melt has been proposed [17]. This viscoelastic model has been applied successfully to describe the composition dependence of sound velocity [17], collective modes [18], atomic transport properties in binary [19] and ternary [20] systems. One relevant prediction from such a model that is related with the present study is the composition dependence of the diffusion coefficient in liquid Ag-Se system [19].…”