Towards a dynamic theory for ion transport in glasses

There is still no encompassing theory of ionic transport in glasses that is widely accepted, even after extensive experimental as well as theoretical work. Consequently, activity in this direction continues to point to the po ssible components that such a theory should include. This is the spirit of this work which investigates the influence of constrained dynamics on the i onic transport in glassy systems. This constrained dynamics is determined b y the interplay between two clearly differentiated timescales: one determin ed by the slow movement of the atoms adjacent to the bottleneck of the pass age of moving ions and the other determined by the rapid movement of these ions. We will show that this interplay between two timescales allows the ge neration of dynamic pathways which are essential for ionic conductivity and associated phenomena.