Local dynamics and phase transition in quantum paraelectric SrTiO3 studied by Ti K-edge x-ray absorption spectroscopy

Andris Anspoks; Janis Timoshenko; Juris Purans; Francesco Rocca; Vladimir Trepakov; Alexander Dejneka; Mitsuru Itoh

doi:10.1088/1742-6596/712/1/012101

Local dynamics and phase transition in quantum paraelectric SrTiO₃ studied by Ti K-edge x-ray absorption spectroscopy

Andris Anspoks
, Janis Timoshenko
, Juris Purans
, Francesco Rocca
, Vladimir Trepakov
, Alexander Dejneka
, Mitsuru Itoh

Research output: Contribution to journal › Conference article › peer-review

4 Citations (Scopus)

Abstract

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.

Original language	English
Article number	012101
Journal	Journal of Physics: Conference Series
Volume	712
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/712/1/012101
Publication status	Published - 2016
Event	16th International Conference on X-Ray Absorption Fine Structure, XAFS 2015 - Karlsruhe, Germany Duration: 23 Aug 2015 → 28 Aug 2015

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title = "Local dynamics and phase transition in quantum paraelectric SrTiO3 studied by Ti K-edge x-ray absorption spectroscopy",

abstract = "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.",

author = "Andris Anspoks and Janis Timoshenko and Juris Purans and Francesco Rocca and Vladimir Trepakov and Alexander Dejneka and Mitsuru Itoh",

year = "2016",

doi = "10.1088/1742-6596/712/1/012101",

language = "English",

volume = "712",

journal = "Journal of Physics: Conference Series",

issn = "1742-6588",

publisher = "IOP Publishing Ltd.",

number = "1",

note = "16th International Conference on X-Ray Absorption Fine Structure, XAFS 2015 ; Conference date: 23-08-2015 Through 28-08-2015",

}

TY - JOUR

T1 - Local dynamics and phase transition in quantum paraelectric SrTiO3 studied by Ti K-edge x-ray absorption spectroscopy

AU - Anspoks, Andris

AU - Timoshenko, Janis

AU - Purans, Juris

AU - Rocca, Francesco

AU - Trepakov, Vladimir

AU - Dejneka, Alexander

AU - Itoh, Mitsuru

PY - 2016

Y1 - 2016

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/84978682908

U2 - 10.1088/1742-6596/712/1/012101

DO - 10.1088/1742-6596/712/1/012101

M3 - Conference article

AN - SCOPUS:84978682908

SN - 1742-6588

VL - 712

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

IS - 1

M1 - 012101

T2 - 16th International Conference on X-Ray Absorption Fine Structure, XAFS 2015

Y2 - 23 August 2015 through 28 August 2015

ER -

Local dynamics and phase transition in quantum paraelectric SrTiO₃ studied by Ti K-edge x-ray absorption spectroscopy

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