Theory of fluctuation conductivity from interband pairing in pnictide superconductors

Abstract

We derive the effective action for superconducting fluctuations in a four-band model for pnictides, discussing the emergence of a single critical mode out of a dominant interband pairing mechanism. We then apply our model to calculate the paraconductivity in two-dimensional and layered three-dimensional systems, and compare our results with recent resistivity measurements in SmFeAsOF

arXiv comment4 pages, 1 figure; final version

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Cited by in corpus (22)

• s+is State with Broken Time Reversal Symmetry in Fe-Based Superconductors
• Superconductivity vs bound state formation in a two-band superconductor with small Fermi energy -- applications to Fe-pnictides/chalcogenides and doped SrTiO3
• Leggett modes in iron-based superconductors as a probe of Time Reversal Symmetry Breaking
• Multiorbital effects on the transport and the superconducting fluctuations in LiFeAs
• Spectroscopic and thermodynamic properties in a four-band model for pnictides
• s+is superconductivity with incipient bands: doping dependence and STM signatures
• Spin-orbital interplay and topology in the nematic phase of iron pnictides
• Superconducting phase fluctuations in SmFeAsO${}_{0.8}$F${}_{0.2}$ from diamagnetism at low magnetic field above $T_c$
• Three Dimensional Superconductivity in FeSe with Tczero Up to 10.9 K Induced by Internal Strain
• Measurements of the superconducting fluctuations in optimally-doped BaFe${}_{2-x}$Ni${}_x$As${}_2$ under high magnetic fields: Probing the 3D anisotropic Ginzburg-Landau approach
• Superconducting fluctuations in isovalently-substituted BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$: Possible observation of multiband effects
• Measurements of the fluctuation-induced in-plane magnetoconductivity at high reduced temperatures and magnetic fields in the iron arsenide BaFe(2-x)NixAs2
• Interorbital pair scattering in clean and impure superconductors
• Dynamic properties of superconductors: Anderson-Bogoliubov mode and Berry phase in BCS and BEC regimes
• Critical and Gaussian conductivity fluctuations in BaFe1.9Ni0.1As2 superconductor
• Anisotropy of the superconducting fluctuations in multiband superconductors: the case of LiFeAs
• Large increase of the anisotropy factor in the overdoped region of Ba(Fe${}_{1-x}$Ni${}_x$)${}_2$As${}_2$ as probed by fluctuation spectroscopy
• Shrinking of fluctuation region in a two-band superconductor
• Superconductivity with repulsion: a variational approach
• Fluctuation conductivity in ultraclean multicomponent superconductors
• Robustness of the Kohn-Luttinger mechanism against symmetry breaking
• Unveiling a Hidden Percolation Transition in Monitored Clifford Circuits: Inroads from ZX-Calculus