Using controlled disorder to distinguish $s_{\pm }$ and $s_{++}$ gap structure in Fe-based superconductors

Abstract

We reconsider the effect of disorder on the properties of a superconductor characterized by a sign-changing order parameter appropriate for Fe-based materials. Within a simple two band model, we calculate simultaneously $T_c$, the change in residual resistivity $\Delta {\rho }_0$, and the zero-energy density of states, and show how these results change for various types of gap structures and assumptions regarding the impurity scattering. The rate of $T_c$ suppression is shown to vary dramatically according to details of the impurity model considered. We search therefore for a practical, experimentally oriented signature of a gap of the $s_{\pm }$ type, and propose that observation of particular evolution of the penetration depth, nuclear magnetic resonance relaxation rate, or thermal conductivity temperature dependence with disorder would suffice.

7 pages, 5 figures

References in corpus (19)

• Gap symmetry and structure of Fe-based superconductors
• Magnetism, superconductivity, and pairing symmetry in Fe-based superconductors
• Two-dimensional resonant magnetic excitation in BaFe1.84Co0.16As2
• NMR relaxation rate in superconducting pnictides: extended $s_{\pm }$ scenario
• Superfluid density of the $\pm$s-wave state for the iron-based superconductors
• Disorder induced transition between s_+- and s_++ states in two-band superconductors
• Superfluid density and specific heat within self-consistent scheme for two-band superconductor
• Lifting of nodes by disorder in extended-$s$ state superconductors: application to ferropnictides
• Momentum-resolved superconducting gap in the bulk of Ba${}_{1-x}$K${}_x$Fe${}_2$As${}_2$ from combined ARPES and $\mu$SR measurements
• Symmetry of spin excitation spectra in the tetragonal paramagnetic and superconducting phases of 122-ferropnictides
• Superconductivity suppression of Ba0.5K0.5Fe2-2xM2xAs2 single crystals by substitution of transition-metal (M = Mn, Ru, Co, Ni, Cu, and Zn)
• First-principles calculation of transition-metal impurities in LaFeAsO
• Effect of Fermi Surface Nesting on Resonant Spin Excitations in Ba1-xKxFe2As2
• Impurity Effects in Sign Reversing Fully-Gapped Superconductors: Analysis of FeAs Superconductors
• Effects of cobalt doping and three-dimensionality in $BaF{e}_{2}A{s}_2$
• Impurity-induced in-gap state and Tc in sign-reversing s-wave superconductors: analysis of iron oxypnictide superconductors
• Universal pair-breaking in transition metal-substituted iron-pnictide superconductors
• Tc suppression and resistivity in cuprates with out of plane defects
• Transport properties of 3D extended s-wave states in Fe-based superconductors

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