Unique vibrational excitations in superionic conducting glass

Nakamura, Mitsutaka; Arai, Masatoshi; Kartini, E.*; Taylor, J. W.*; Russina, M.*

AIP Conference Proceedings 832, p.504 - 507, 2006/05

https://doi.org/10.1063/1.2204548

Superionic glasses (AgI)(AgS)(AgPO) and (AgI)(AgPO) have high ionic conductivity at room temperature (S/cm). The inelastic neutron scattering measurements show that the superionic glass has larger intensity in low-energy region compared with undoped insulator glass (AgPO). For superionic glasses we find an excess intensity above =1.8 and peak profile at around 2.2 by investigating the -dependent features in low-energy region. These phenomena should be universal features of silver-salt superionic glass. We suppose that Ag-Ag dynamical correlation should promote the successive hopping process, and result in high ionic conductivity.