title: Relationship between structure, entropy, and mobility in network-forming ionic melts.
abstract: Diffusivity, ionic conductivity, and viscosity of network-forming ionic melts are examined using molecular dynamics simulations of BeF2 and SiO2 melts. These tetrahedral, network-forming ionic melts are shown to possess a conductivity anomaly, in addition to waterlike viscosity and diffusivity anomalies, corresponding to a striking breakdown of the Nernst-Einstein relation. The contrasting scaling behavior of the different mobility measures with different structural contributions to the excess entropy is demonstrated.
authors.affiliation: Department of Chemistry, Indian Institute of Technology-Delhi, New Delhi 110016, India.
authors.forename: Manish
authors.initials: M
authors.lastname: Agarwal
authors.forename: Charusita
authors.initials: C
authors.lastname: Chakravarty