Ultrathin films of ferroelectric solid solutions under residual depolarizing field

Details Ultrathin films of ferroelectric solid solutions under residual depolarizing field Ultrathin films of ferroelectric solid solutions under residual depolarizing field

2004-03-18

arxiv.org/abs/cond-mat/0403484v1

Physics

Condensed Matter

Materials Science

REVTeX, 7 pages, 2 figures, fig 2 in color

Scientific paper

10.1103/PhysRevLett.93.196104

A first-principles-derived approach is developed to study the effects of uncompensated depolarizing electric fields on the properties of Pb(Zr,Ti)O$_3$ ultrathin films for different mechanical boundary conditions. A rich variety of ferroelectric phases and polarization patterns is found, depending on the interplay between strain and amount of screening of surface charges. Examples include triclinic phases, monoclinic states with in-plane and/or out-of-plane components of the polarization, homogeneous and inhomogeneous tetragonal states, as well as, peculiar laminar nanodomains.

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