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• W1967317138 endingPage "1230013" @default.
• W1967317138 startingPage "1230013" @default.
• W1967317138 abstract "Effects of the order parameter symmetries on the cutoff parameter ξ h (determining the magnetic field distribution) in the mixed state are investigated in the framework of quasiclassical Eilenberger theory for isotropic s ± , s ++ and anisotropic d x 2 -y 2 -wave superconducting pairings. These symmetries are proposed for the pairing state of the Fe -pnictides. In s ± pairing symmetry, the gap function has opposite sign at the electron and hole pockets of the Fermi surface, it is connected with interband antiferromagnetic spin fluctuations. In s ++ pairing symmetry, the gap function has the same sign at the Fermi surface, it is mediated by moderate electron–phonon interaction due to Fe -ion oscillation and the critical orbital fluctuation. The d x 2 -y 2 pairing symmetry can rise from intraband antiferromagnetic spin fluctuation in strongly hole overdoped iron pnictide KFe 2 As 2 and ternary chalcogenides. The s ± pairing symmetry results in different effects of intraband (Γ 0 ) and interband (Γ π ) impurity scattering on ξ h . It is found that ξ h /ξ c2 value decreases with Γ 0 leading to the values much less than those predicted by the analytical Ginzburg–Landau (AGL) theory for high Γ 0 . At very high Γ 0 , the interband scattering suppresses ξ h /ξ c2 considerably below one in the whole field range making it flat for both s ± and s ++ pairing symmetries. Scaling of the cutoff parameter with the electromagnetic coherence length shows the importance of the nonlocal effects in mixed state. The small values of ξ h /ξ c2 were observed in μSR measurements of Co -doped BaFe 2 As 2 . If Γ 0 and Γ π are small and equal than the ξ h /ξ c2 (B/B c2 ) dependence for s ± symmetry behaves like that of the AGL model and shows a minimum with value much more than that obtained for s ++ superconductors. With high Γ π , the ξ h /ξ c2 (B/B c2 ) dependence resides above the AGL curve for s ± pairing symmetry, as observed in SANS measurements of stoichiometrical LiFeAs compound. In d-wave superconductors, ξ h /ξ c2 always increases with Γ similar to the s ± symmetry case with Γ 0 = Γ π ." @default.
• W1967317138 created "2016-06-24" @default.
• W1967317138 creator A5046717258 @default.
• W1967317138 creator A5050815472 @default.
• W1967317138 creator A5065844311 @default.
• W1967317138 creator A5087972946 @default.
• W1967317138 date "2012-07-16" @default.
• W1967317138 modified "2023-10-18" @default.
• W1967317138 title "IMPACT OF THE ORDER PARAMETER SYMMETRIES ON THE VORTEX CORE STRUCTURE IN IRON-BASED SUPERCONDUCTORS" @default.
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• W1967317138 doi "https://doi.org/10.1142/s021798491230013x" @default.
• W1967317138 hasPublicationYear "2012" @default.

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