Triplet pairing, orbital selectivity, and correlations in iron-based superconductors

Yashar Komijani; Elio König; Piers Coleman

doi:10.1103/nx2p-k972

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Triplet pairing, orbital selectivity, and correlations in iron-based superconductors

Yashar Komijani, Elio König, Piers Coleman

DOI 10.1103/nx2p-k972 · Physical Review B

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Abstract

We use a slave-boson approach to study the band renormalization and pair susceptibility in the normal state of iron-based superconductors in presence of strong Coulomb repulsion and Hund's interaction. Our results show orbital selectivity toward localization of xy orbitals and its interplay with superconductivity. We also compare the recently proposed triplet resonating valence bond (tRVB) theory of superconductivity in iron-based superconductors with the more conventional s± pairing. We show that both favor a superconductivity when the xy orbital is delocalized, but the tRVB superconductivity supports a second weaker dome when xy orbital is localized.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
SrRuO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown