Chemical disorder and network structure of glassy As2Te3

DOI

Telluride glassy systems are widely used for phase-change optical recording. They are also promising materials for far-IR applications. The atomic structure of telluride glasses is much less known compared to their sulphide and selenide counterparts. A typical example is glassy As2Te3, which exhibits a significant chemical disorder, characterized by homopolar As-As and Te-Te bonds. Recently, high-pressure experiments using glassy As2Te3 have shown a number of unusual phenomena. Surprisingly, our high-energy X-ray diffraction measurements have shown a distinct decrease of homopolar bonds in g-As2Te3, recovered from 8.5 GPa, while an increase of chemical disorder at high pressure was expected. Neutron diffraction measurements are complementary to X-ray scattering results for this particular system and will allow a detailed structural model for g-As2Te3 to be constructed.

Identifier
DOI https://doi.org/10.5286/ISIS.E.86390180
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/86390180
Provenance
Creator Professor Eugene Bychkov; Dr Alex Hannon
Publisher ISIS Neutron and Muon Source
Publication Year 2020
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Photon- and Neutron Geosciences
Temporal Coverage Begin 2017-05-27T07:00:00Z
Temporal Coverage End 2017-06-01T13:14:52Z