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RESEARCH PRODUCT
Local dynamics and phase transition in quantum paraelectric SrTiO3 studied by Ti K-edge x-ray absorption spectroscopy
Mitsuru ItohFrancesco RoccaJanis TimoshenkoAndris AnspoksJuris PuransV. A. TrepakovA. Dejnekasubject
HistoryX-ray absorption spectroscopyPhase transitionMaterials scienceCondensed matter physics02 engineering and technologySoft modesDielectric021001 nanoscience & nanotechnology01 natural sciencesFerroelectricityComputer Science ApplicationsEducationchemistry.chemical_compoundCondensed Matter::Materials Sciencechemistry0103 physical sciencesStrontium titanate010306 general physics0210 nano-technologyQuantum statistical mechanicsAbsorption (electromagnetic radiation)description
Strontium titanate is a model quantum paraelectric in which, in the region of dominating quantum statistics, the ferroelectric instability is inhibited due to nearly complete compensation of the harmonic contribution into ferroelectric soft mode frequency by the zero- point motion contribution. The enhancement of atomic masses by the substitution of 16 O with 18O decreases the zero-point atomic motion, and low-T ferroelectricity in SrTi18O3 is realized. In this study we report on the local structure of Ti in SrTi16O3 and SrTi18O3 investigated by Extended X-ray Absorption Fine Structure measurements in the temperature range 6 - 300 K.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-05-01 | Journal of Physics : Conference Series |