Understanding the ionic transport in the thermoelectric, mixed-conducting argyrodites Ag8+xMSe6 (M = Ge, Ga)
The silver conducting argyrodites with the general formula Ag8+xMSe6 (M = Si, Ge, Sn, Ga) have attracted significant attention because of their intrinsically low lattice thermal conductivity, believed to originate from their superionic conduction and strong local structural disorder. Recently, it was shown that the low thermal transport cannot be correlated directly with the magnitude of the macroscopic ionic conduction, but the fundamental mechanism and potential interplay on a microscopic scale remains elusive. We propose an experimental study of the silver dynamics in the argyrodites, to assess ionic diffusion, residence times and jump lengths in a wide temperature range. We believe the proposed experiments, in combination with local structural characterizations and NMR spectroscopy, will give the necessary insights to uncover potential interrelations of thermal and ionic transport on a microscopic scale, while guiding the understanding of ionic transport in the material class.
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The recommended format for citing this dataset in a research publication is in the following format:
ZEIER Wolfgang; APPEL Markus; BERNGES Tim; GHATA ANUPAMA; MARTINEZ DE IRUJO LABALDE Xabier; MAUS Oliver and ZHAO Tong. (2023). Understanding the ionic transport in the thermoelectric, mixed-conducting argyrodites Ag8+xMSe6 (M = Ge, Ga). Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-03-229
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