Ferroelectric Control of Metal-Insulator Transition
arXiv:1512.08920 · doi:10.1016/j.ssc.2015.12.014
Abstract
We propose a method of controlling the metal-insulator transition of one perovskite material at its interface with a another ferroelectric material based on first principle calculations. The operating principle is that the rotation of oxygen octahedra tuned by the ferroelectric polarization can modulate the superexchange interaction in this perovskite. We designed a tri-color superlattice of (BiFeO)/LaNiO/LaTiO, in which the BiFeO layers are ferroelectric, the LaNiO layer is the layer of which the electronic structure is to be tuned, and LaTiO layer is inserted to enhance the inversion asymmetry. By reversing the ferroelectric polarization in this structure, there is a metal-insulator transition of the LaNiO layer because of the changes of crystal field splitting of the Ni orbitals and the bandwidth of the Ni in-plane orbital. It is highly expected that a metal-transition can be realized by designing the structures at the interfaces for more materials.
References in corpus (7)
- Orbital order and possible superconductivity in LaNiO3/LaMO3 superlattices
- Suppression of Octahedral Tilts and Associated Changes of Electronic Properties at Epitaxial Oxide Heterostructure Interfaces
- Emergent properties hidden in plane view: Strong electronic correlations at oxide interfaces
- Modifying the Electronic Orbitals of Nickelate Heterostructures Via Structural Distortions
- Chemical control of orbital polarization in artificially structured transition-metal oxides: La2NiXO6 (X=B, Al, Ga, In) from first principles
- Structural origins of the properties of rare earth nickelate superlattices
- Nickel-Titanium double perovskite: A three-dimensional spin-1 Heisenberg antiferromagnet