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    Modeling functional piezoelectricity in perovskite superlattices with competing instabilities

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    Genre
    Journal Article
    Date
    2012-02-02
    Author
    Swartz, CW
    Wu, X
    Subject
    cond-mat.mtrl-sci
    cond-mat.mtrl-sci
    Permanent link to this record
    http://hdl.handle.net/20.500.12613/6012
    
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    DOI
    10.1103/PhysRevB.85.054102
    Abstract
    Based on the locality principle of insulating superlattices, we apply the method of Wu to the piezoelectric strains of individual layers under a fixed displacement field. For a superlattice of arbitrary stacking sequence, an accurate model is acquired for predicting piezoelectricity. By applying the model in the superlattices where ferroelectric and antiferrodistortive modes are in competition, functional piezoelectricity can be achieved. A strong nonlinear effect is observed and can be further engineered in the PbTiO 3/SrTiO3 superlattice, and an interface enhancement of piezoelectricity is found in the BaTiO3/CaTiO3 superlattice. © 2012 American Physical Society.
    Citation to related work
    American Physical Society (APS)
    Has part
    Physical Review B - Condensed Matter and Materials Physics
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    ae974a485f413a2113503eed53cd6c53
    http://dx.doi.org/10.34944/dspace/5994
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