Precursor dynamics to the structural instability in SrTiO3

Roleder, K.; Bussmann-Holder, A.; Gorny, M.; Szot, K.; Glazer, A. M.

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Precursor dynamics to the structural instability in SrTiO₃

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Bussmann-Holder, A.
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;
Department Electronic Structure Theory (Ali Alavi), Max Planck Institute for Solid State Research, Max Planck Society;
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;
Department Nanochemistry (Bettina V. Lotsch), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Roleder, K., Bussmann-Holder, A., Gorny, M., Szot, K., & Glazer, A. M. (2012). Precursor dynamics to the structural instability in SrTiO₃. Phase Transitions, 85(11), 939-948.

Cite as: https://hdl.handle.net/21.11116/0000-000E-C2CC-1

Abstract

The structural instability of SrTiO3 at T-S = 105 K is reinvestigated experimentally and theoretically by birefringence measurements and within the self-consistent phonon approximation. Analogous to BaTiO3 the phase transition shows precursor dynamics starting approximately 60 K above the phase transition temperature. These rotational dynamic clusters compete with precursor effects stemming from the polar soft mode and appear on different length scales as compared to BaTiO3.