Electron-lattice instabilities suppress cuprate-like electronic structures in SrFeO3/SrTiO3 superlattices
James M. Rondinelli, Nicola A. Spaldin
DOI 10.1103/PhysRevB.81.085109 · Physical Review B
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Abstract
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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| SrFeO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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