Publikationen

Diffusive dynamics in an amorphous superionic conductor

Autor(en)
Christoph Tietz, Tobias Michael Fritz, Katharina Holzweber, Michael Legenstein, Michael Leitner, Bogdan Sepiol
Abstrakt

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(en)
Dynamik Kondensierter Systeme
Externe Organisation(en)
Universität Wien, Technische Universität München
Journal
Physical Review Research
Band
2
Anzahl der Seiten
10
ISSN
2643-1564
DOI
https://doi.org/10.1103/PhysRevResearch.2.043141
Publikationsdatum
10-2020
Peer-reviewed
Ja
ÖFOS 2012
103015 Kondensierte Materie, 103009 Festkörperphysik, 103018 Materialphysik
Schlagwörter
ASJC Scopus Sachgebiete
Condensed Matter Physics
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/diffusive-dynamics-in-an-amorphous-superionic-conductor(5853c5ae-53fb-4a95-9302-c81b787e74df).html