Spin-triplet p-wave pairing in a three-orbital model for iron pnictide superconductors
Patrick A. Lee, Xiao-Gang Wen
DOI 10.1103/PhysRevB.78.144517 · Physical Review B
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Abstract
We examine the possibility that the superconductivity in the newly discovered FeAs materials may be caused by the Coulomb interaction between d electrons of the iron atoms. We find that when the Hund’s rule ferromagnetic interaction is strong enough, the leading pairing instability is in spin-triplet p-wave channel in the weak-coupling limit. The resulting superconducting gap has nodal points on the two-dimensional Fermi surfaces. The k dependent hybridization of several orbitals around a Fermi pocket is the key for the appearance of the spin-triplet p-wave pairing.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaOFeAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| LaO1-xFxFeAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 25 | Pressure not reported | unknown |
| LaO1-xSrxFeAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 25 | Pressure not reported | unknown |
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