Piezoelectrics by Design: A Route through Short-period Perovskite Superlattices

Details Piezoelectrics by Design: A Route through Short-period Perovskite Superlattices Piezoelectrics by Design: A Route through Short-period Perovskite Superlattices

2010-07-19

arxiv.org/abs/1007.3069v1

Physics

Computational Physics

4 pages, 2 figures

Scientific paper

Using first-principles density functional theory, we study piezoelectricity in short-period superlattices made with combination of ferroelectric and paraelectric components and exhibiting polar discontinuities. We show that piezoelectric response of such a superlattice can be tuned both in terms of sign and magnitude with a choice of its components. As these superlattices with nonswitchable polarization do not undergo ferroelectric transitions, we predict them to exhibit a robust piezoelectric response with weaker temperature dependence compared to their bulk counterparts.

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