Emergence of Conduction Channels in Lithium Silicate

Abstract

The existence of conduction channels in lithium silicate (Li_2O)(SiO_2) is investigated. Regions of the system where many different ions pass by form channels and are thus spatially correlated. For a closer analysis the properties of the individual ionic sites are elucidated. The mobility of ions in single sites is found to depend strongly on the number of bridging oxygens in the coordination shell. The channels are not reflected in the network structure as obtained from the distribution of the bridging oxygens. Spatial correlations similar to those found in the silicate also emerge from studying the dynamics of particles in a simple random lattice model. This supports the suggestion that the observed spatial correlations can be viewed in analogy to the emergence of percolation paths.

arXiv comment5 pages, 8 figures, submitted to Phys. Rev. B

References in corpus (4)

• Channel diffusion of sodium in a silicate glass
• The dynamics of sodium in sodium disilicate: Channel relaxation and sodium diffusion
• Complete identification of alkali sites in ion conducting lithium silicate glasses: a computer study of ion dynamics
• Characterization of the complex ion dynamics in lithium silicate glasses via computer simulations

Cited by in corpus (3)

• Contributions to the mixed-alkali effect in molecular dynamics simulations of alkali silicate glasses
• Comparison of ion sites and diffusion paths in glasses obtained by molecular dynamics simulations and bond valence analysis
• The cationic energy landscape in alkali silicate glasses: properties and relevance