Using ab initio density-functional theory we explore the behavior of thin layers of metallic d4 SrFeO3 confined between the d0 dielectric SrTiO3 in a superlattice geometry. We find that the presence of insulating SrTiO3 spacer layers strongly affects the electronic properties of SrFeO3: for single SrFeO3 layers constrained to their bulk cubic structure, the Fermi surface is two dimensional, nested, and resembles that of the hole-doped superconducting cuprates. A Jahn-Teller instability couples to an octahedral tilt mode, however, to remove this degeneracy resulting in insulating superlattices.
|Original language||English (US)|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - Feb 10 2010|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics