An anomalous X-ray scattering study on glassy superionic conductor (As2Se3)0.4(AgI)0.6 using a third-generation synchrotron radiation facility

Abstract Anomalous X-ray scattering experiments for glassy superionic conductor (As 2 Se 3 ) 0.4 (AgI) 0.6 were performed at energies close to the As, Se, and Ag K edges using a third-generation synchrotron radiation facility, ESRF. The differential structure factors, Δ i S ( Q ), were obtained from the detailed analyses, indicating that Δ As S ( Q ) and Δ Se S ( Q ) are similar to those of glassy As 2 Se 3 except at the prepeak position, and Δ Ag S ( Q ) that of molten salt-like. In the differential pair correlation functions, Δ i g ( r ), Δ Ag g ( r ) shows no correlation at the first peak positions of Δ As g ( r ) or Δ Se g ( r ), and vice versa. From these findings, it can be concluded that a pseudo-binary mixture of the As 2 Se 3 network matrix and AgI-related conduction pathways is a good structural model for this superionic glass.