Magnetic ordering in blocking layer and highly anisotropic electronic structure of high-Tc iron-based superconductor Sr2VFeAsO3: LDA+U study
Hiroki Nakamura, Masahiko Machida
DOI 10.1103/PhysRevB.82.094503 · Physical Review B
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Abstract
We calculate electronic structures of a high-Tc iron-based superconductor Sr2VFeAsO3 by local-density approximation (LDA) plus U method. We assume a checkerboard antiferromagnetic order on its blocking layers including vanadium and strong correlation in d orbits of vanadium through the Hubbard U. While the standard LDA brings about metallic blocking layers and complicated Fermi surface as in the previous literatures, our calculation changes the blocking layer into insulating one and the Fermi surface becomes quite similar to those of other iron-based superconductors. Moreover, the appearance of the insulating blocking layers suggests high anisotropy on quasiparticle transports as experimental results and predicts new types of intrinsic Josephson effects.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Sr2VFeAsO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 37 | Pressure not reported | unknown |
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