Depolarizing-Field Effect in Strained Nanoscale Ferroelectric Capacitors and Tunnel Junctions
arXiv:cond-mat/0603762 · doi:10.1103/PhysRevLett.98.257603
Abstract
The influence of depolarizing field on the magnitude and stability of a uniform polarization in ferroelectric capacitors and tunnel junctions is studied using a nonlinear thermodynamic theory. It is predicted that, in heterostructures involving strained epitaxial films and metal electrodes, the homogeneous polarization state may remain stable against transformations into the paraelectric phase and into polydomain states down to the nanoscale. This result supports the possibility of depolarizing-field-related resistive switching in ferroelectric tunnel junctions with dissimilar electrodes. The resistance on/off ratio in such junctions is shown to be governed by the difference between the reciprocal capacitances of screening space charges in the electrodes.
11 pages, 3 figures, changed content
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Cited by in corpus (15)
- Electroresistance effects in ferroelectric tunnel barriers
- Fast Molecular-Dynamics Simulation for Ferroelectric Thin-Film Capacitors Using a First-Principles Effective Hamiltonian
- Interfacial Magnetoelectric Coupling in Tri-component Superlattices
- Thickness-dependent polarization of strained BiFeO3 films with constant tetragonality
- Surface Effect on Domain Wall Width in Ferroelectrics
- Imaging Mechanism of Piezoresponse Force Microscopy in Capacitor Structures
- Effect of a built-in electric field in asymmetric ferroelectric tunnel junctions
- Full field electron spectromicroscopy applied to ferroelectric materials
- Strong enhancement of direct magnetoelectric effect in strained ferroelectric-ferromagnetic thin-film heterostructures
- Polarization and magnetization dynamics of a field-driven multiferroic structure
- Effects of anisotropic elasticity in the problem of domain formation and stability of monodomain state in ferroelectric films
- Electric dipole sheets in BaTiO/BaZrO superlattices
- Beating the superparamagnetic size limit of nanoparticles on a ferroelectric substrate
- Free-standing ferroelectric multilayers: Crossover from thin-film to bulk behavior
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