Quantum critical points in relaxor-type ferroelectric tetragonal tungsten bronzes

DOI

Quantum Critical Points in ferroelectrics, where the transition temperature is very near absolute zero, are of significant current interest, with publications in Nature-family journals, Physical Review Letters, and other high-impact journals. However, only a few crystal structures, emphasizing perovskites, have been measured via most techniques. Potassium lithium tantalate (KLT) has a reported transition at T=7K, but it remains controversial and its cryogenic structure would be clarified by neutron spectroscopy. KLT is very unusual in other ways: Of several hundred tetragonal tungsten bronzes, only two have the small c-axis triangular sites occupied. This makes it a Li-ion conductor, and we have already established that it is a relaxor ferroelectric, meaning that its apparent transition temperature depends strongly upon probe frequency.

Identifier
DOI https://doi.org/10.5286/ISIS.E.90681653
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/90681653
Provenance
Creator Miss Rebecca Mary Smith; Dr Jonathan Gardner; Dr Alexandra Gibbs; Professor James Scott; Mr Grant William Howieson
Publisher ISIS Neutron and Muon Source
Publication Year 2021
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 Chemistry; Natural Sciences; Physics
Temporal Coverage Begin 2018-06-09T07:00:00Z
Temporal Coverage End 2018-06-27T11:45:55Z