Anomalous low-temperature conductivity of As-S glasses
The aim of this project is to verify our assumption that the universal anomalous low-temperature properties of the glasses can originate from various types of nanoclusters presented in the As-S glassy matrix. Depending on the sample's composition, it is possible to change the representation of individual nanoclusters characterized by different sizes, topology, and a number of connection points to the glassy matrix. Two samples were selected as the limiting case for the indication of a dominant nanocluster, sulfur-rich sample As29S71 and arsenic-rich sample As50S50. It is expected that ring-like S8 nanoclusters may dominate the As29S71 and nanoclusters with AsżAs homo-nuclear bound in As50S50. The main motivation is to directly prove the presence of individual nanoclusters types in the As-S glassy structure and identify each nanocluster representation. Neutron pair distribution function (PDF) technique will be used to quantitatively describe short and medium range order of selected As-S glassy materials. Special emphasis will be placed on a study of their local atomic structure at low temperatures (2-20 K) where they show anomalous behavior of thermal conductivity.
The data is currently only available to download if you are a member of the proposal team.
The recommended format for citing this dataset in a research publication is in the following format:
BEDNARCIK JOZEF; CUELLO Gabriel; KAUR ravneet and TKAC Vladimír. (2023). Anomalous low-temperature conductivity of As-S glasses. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.6-05-1069
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This data is not yet public
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