DOI > 10.5291/ILL-DATA.TEST-3279

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Title

QENS study of super-uionic compounds Ag2TeSeS

Abstract

Ag2Te/Se/S compounds are promising thermoelectric materials for room temperature applications. They show very low energy vibrational excitations (~2.5meV) which soften upon heating. Their detailed energy depends on the composition and thus the Te, Se, and S content. In addition to the soft phonon modes Ag2Te/Se/S exhibit fast ionic diffusion of Ag. The onset T of the fast diffusion is as well dependent on the composition and can be as low as 200K for Ag2Te. This Ag diffusion has not been characterized yet for their microscopic mechanism. Geometry of the diffusion and energy scale are not known. We request the IN16/BATS beam to close this information gap by measurements of the QENS signal on 1-500 microeV scale at a few temperatures.

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Data Citation

The recommended format for citing this dataset in a research publication is in the following format:

KOZA Michael Marek; APPEL Markus and FEJERCAK Milos. (2023). QENS study of super-uionic compounds Ag2TeSeS. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.TEST-3279

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