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arXiv · 1005.1430

Piezoelectricity in the dielectric component of nanoscale dielectric/ferroelectric superlattices

Ji Young Jo·Rebecca J. Sichel·Ho Nyung Lee·Serge M. Nakhmanson·Eric M. Dufresne·Paul G. Evans
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Abstract

The origin of the functional properties of complex oxide superlattices can be resolved using time-resolved synchrotron x-ray diffraction into contributions from the component layers making up the repeating unit. The CaTiO3 layers of a CaTiO3/BaTiO3 superlattice have a piezoelectric response to an applied electric field, consistent with a large continuous polarization throughout the superlattice. The overall piezoelectric coefficient at large strains, 54 pm/V, agrees with first-principles predictions in which a tetragonal symmetry is imposed on the superlattice by the SrTiO3 substrate.

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Ji Young Jo, Rebecca J. Sichel, Ho Nyung Lee, Serge M. Nakhmanson, Eric M. Dufresne, Paul G. Evans. 2010-05-09. Piezoelectricity in the dielectric component of nanoscale dielectric/ferroelectric superlattices. https://doi.org/10.1103/physrevlett.104.207601

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