Effect of Epitaxial Strain on the Spontaneous Polarization of Thin Film Ferroelectrics
Effect of Epitaxial Strain on the Spontaneous Polarization of Thin Film Ferroelectrics
We investigate the variation of the spontaneous ferroelectric polarization with epitaxial strain for BaTiO$_3$, PbTiO$_3$, LiNbO$_3$, and BiFeO$_3$ using first principles calculations. We find that while the strain dependence of the polarization is very strong in the simple perovskite systems BaTiO$_3$ and PbTiO$_3$ it is only weak in LiNbO$_3$ and …