Publications

Diffusive dynamics in an amorphous superionic conductor

Author(s)
Christoph Tietz, Tobias Michael Fritz, Katharina Holzweber, Michael Legenstein, Michael Leitner, Bogdan Sepiol
Abstract

The fast diffusion of alkali ions and resulting high ionic conductivity is a defining feature of alkali borate glasses. Here we report impedance spectroscopy and atomic-scale x-ray photon correlation spectroscopy measurements on rubidium borate systems (Rb2O)x(B2O3)100−x with particular focus on x=30mol %. We find that the coherently scattered intensity does not show temporal fluctuations on timescales corresponding to ionic diffusion. We conclude that the spatial configuration of alkali sites as stepping stones for ionic diffusion evolves on the same timescales as the borate backbone, and that the defect density is low, i.e., at a given instant, nearly all alkali sites are singly occupied.

Organisation(s)
Dynamics of Condensed Systems
External organisation(s)
Universität Wien, Technische Universität München
Journal
Physical Review Research
Volume
2
No. of pages
10
ISSN
2643-1564
DOI
https://doi.org/10.1103/PhysRevResearch.2.043141
Publication date
10-2020
Peer reviewed
Yes
Austrian Fields of Science 2012
103015 Condensed matter, 103009 Solid state physics, 103018 Materials physics
Keywords
ASJC Scopus subject areas
Condensed Matter Physics
Portal url
https://ucris.univie.ac.at/portal/en/publications/diffusive-dynamics-in-an-amorphous-superionic-conductor(5853c5ae-53fb-4a95-9302-c81b787e74df).html