Pairing strengths for a two orbital model of the Fe-pnictides

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dc.creatorQi, Xiao-Liang
dc.creatorRaghu, S.
dc.creatorLiu, Chao-Xing
dc.creatorScalapino, D. J.
dc.creatorZhang, Shou-Cheng
dc.date2008-04-28
dc.date2008-04-28
dc.date.accessioned2026-07-07T09:35:35Z
dc.date.available2026-07-07T09:35:35Z
dc.descriptionUsing an RPA approximation, we have calculated the strengths of the singlet and triplet pairing interactions which arise from the exchange of spin and orbital fluctuations for a 2-orbital model of the Fe-pnictide superconductors. When the system is doped with F, the electron pockets become dominant and we find that the strongest pairing occurs in the singlet d-wave pairing and the triplet p-wave pairing channels, which compete closely. The pairing structure in the singlet d-wave channel corresponds to a superposition of near neighbor intra-orbital singlets with a minus sign phase difference between the $d_{xz}$ and $d_{yz}$ pairs. The leading pairing configuration in the triplet channel also involves a nearest neighbor intra-orbital pairing. We find that the strengths of both the singlet and triplet pairing grow, with the singlet pairing growing faster, as the onsite Coulomb interaction approaches the value where the S=1 particle-hole susceptibility diverges.
dc.description5 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0804.4332
dc.identifierhttp://arxiv.org/abs/0804.4332
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/159876
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titlePairing strengths for a two orbital model of the Fe-pnictides
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