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X-ray absorption study of the local dipole moment in SrTiO3 under uniaxial pressure

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Abstract

X-ray absorption spectra under uniaxial pressure were measured at the Ti K-edge of a SrTiO3 single crystal in order to obtain direct evidence for the ferroelectric transition that is expected on the basis of second harmonic generation studies. A uniaxial pressure was applied perpendicular to the ab-plane. The pre-edge peak, which corresponds to Ti 3d e g -O 2pσ bonding, shows little change across the transition temperature of 40 K at 1 GPa. This indicates that a local electric dipole moment is not induced under uniaxial pressure, as opposed to the macroscopic ferroelectric moments that are predicted to be induced along the ab-plane.

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Authors and Affiliations

  1. Graduate School of Science, Hiroshima University, Higashi-Hiroshima, 739-8526, Hiroshima, Japan

    Chisato Temba, Shuhei Kawakami, Nobuo Nakajima, Naoki Ishimatsu & Hiroshi Maruyama

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  1. Chisato Temba
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  2. Shuhei Kawakami
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  3. Nobuo Nakajima
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  4. Naoki Ishimatsu
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  5. Hiroshi Maruyama
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Correspondence to Hiroshi Maruyama.

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Temba, C., Kawakami, S., Nakajima, N. et al. X-ray absorption study of the local dipole moment in SrTiO3 under uniaxial pressure. Journal of the Korean Physical Society 66, 1386–1388 (2015). https://doi.org/10.3938/jkps.66.1386

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  • DOI: https://doi.org/10.3938/jkps.66.1386

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