2021
DOI: 10.48550/arxiv.2111.13239
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Recovery of harmonic-like behaviour of the polar mode in BaTiO$_3$ at high pressure

A. Herlihy,
T. A. Bird,
C. J. Ridley
et al.

Abstract: The local structure of high pressure BaTiO3 has been interrogated by neutron total scattering methods, up to pressures of 4.18 GPa at ambient temperature. Competitive refinements of cubic, tetragonal and rhombohedral distortion modes against pair distribution functions indicate contrasting local structure behaviour of temperature-and pressure-induced cubic BaTiO3. Suppression of the mode amplitude, isotropy of the order parameter direction and loss of sensitivity to correlated Ti displacements at high pressure… Show more

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