6533b86ffe1ef96bd12cdae6
RESEARCH PRODUCT
A high-temperature x-ray absorption spectroscopy study of
Paolo FornasiniJuris PuransAlexei KuzminGiuseppe DalbaF. Roccasubject
X-ray absorption spectroscopyCondensed matter physicsAbsorption spectroscopyExtended X-ray absorption fine structureJahn–Teller effectchemistry.chemical_elementElectronRheniumCondensed Matter PhysicsMolecular physicsXANESElectron localization functionCondensed Matter::Materials SciencechemistryCondensed Matter::SuperconductivityCondensed Matter::Strongly Correlated ElectronsGeneral Materials Sciencedescription
We present for the first time a high-temperature x-ray absorption spectroscopy study of at the edge. The analysis both of the XANES and of the EXAFS regions shows that, in , a progressive localization of the 5d states following the temperature rise is accompanied at T > 350 K by a distortion of the octahedra, which increases up to the decomposition temperature . The distortion leads to the lowering of the rhenium site symmetry from and is due to the electron - phonon coupling of the 5d electrons with the and phonons and to the Jahn - Teller effect caused by the rhenium electron which becomes localized at high temperature.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1996-11-11 | Journal of Physics: Condensed Matter |