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 ${\text{SmFeAsO}}_{0.8}{\text{F}}_{0.2}$.

References

Page 1

	Year	Citations
Iron-Based Layered Superconductor La[O<sub>1-</sub><i><sub>x</sub></i>F<i><sub>x</sub></i>]FeAs (<i>x</i> = 0.05−0.12) with <i>T</i><sub>c</sub> = 26 K Yoichi Kamihara, Takumi Watanabe, Masahiro Hirano, Journal of the American Chemical Society Superconducting MaterialMagnetic PropertiesEngineeringBismuth-based SuperconductorsNovel Superconductors	2008	7.7K
The influence of fluctuation pairing of electrons on the conductivity of normal metal L. G. Aslamasov, A. I. Larkin Physics Letters A Fluctuation PairingEngineeringPhysicsElectronic StructureApplied Physics	1968	1K
Observation of Fermi-surface–dependent nodeless superconducting gaps in Ba <sub>0.6</sub> K <sub>0.4</sub> Fe <sub>2</sub> As <sub>2</sub> Hong Ding, P. Richard, Koji S. Nakayama, Europhysics Letters (EPL)	2008	938
Magnetism, superconductivity, and pairing symmetry in iron-based superconductors Andrey V. Chubukov, D. V. Efremov, Ilya Eremin Physical Review B Superconducting MaterialMagnetic PropertiesEngineeringBismuth-based SuperconductorsMagnetic Materials	2008	707
Beyond Eliashberg Superconductivity in MgB2 Jens Kortus, Amy Liu, I. I. Mazin Technische Universität Dortmund Eldorado (Technische Universität Dortmund) Superconducting MaterialHigh-tc SuperconductivityEngineeringPhysicsNovel Superconductors	2001	593
Multiband magnetism and superconductivity in Fe-based compounds Europhysics Letters (EPL)	2009	311
Effective actions and phase fluctuations in<b><i>d</i></b>-wave superconductors Arun Paramekanti, Mohit Randeria, T. V. Ramakrishnan, Physical review. B, Condensed matter	2000	99
Effective Lagrangians for BCS superconductors at<i>T</i>=0 I. J. R. Aitchison, Ping Ao, D. J. Thouless, Physical review. B, Condensed matter	1995	90
Spin fluctuation dynamics and multiband superconductivity in iron pnictides Valentin Stanev, Jian Kang, Zlatko Tešanović Physical Review B Superconducting MaterialCharge ExcitationsEngineeringBismuth-based SuperconductorsSpin Dynamic	2008	78
Upper critical field and fluctuation conductivity in the critical regime of doped SmFeAsO I. Pallecchi, Carlo Fanciulli, M. Tropeano, Physical Review B Magnetic PropertiesEngineeringMagnetic ResonanceMagnetoresistanceCritical Regime	2009	73

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