Crystal structure and phase transitions of Sr2IrO4

DOI

Sr2IrO4 is an important material in the field of condensed matter physics, being a proposed J_eff=1/2 Mott insulator. Recent publications have shown that the reported low- and room-temperature space group (I4_1/acd) cannot be correct due to the presence of forbidden reflections over a wide temperature range. Small distortions can have dramatic effects on the electronic structure of iridate materials. The Ir-O orbital overlap is directly affected by IrO6 octahedral tilts and rotations. Therefore, the determination of the correct structure is essential for future theoretical and experimental investigations of this important system. The first objective of this experiment is to determine the correct space group for Sr2IrO4. The second is to investigate the (so far unexplored) high temperature phase transitions of this compound to understand the origin of the distortion at room temperature.

Identifier
DOI https://doi.org/10.5286/ISIS.E.61004751
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/61004751
Provenance
Creator Professor Hidenori Takagi; Dr Alexandra Gibbs
Publisher ISIS Neutron and Muon Source
Publication Year 2018
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 2015-06-23T07:00:00Z
Temporal Coverage End 2015-06-28T07:00:00Z