Effect of weak disorder on the phase competition in iron pnictides

Abstract

We analyze the effect of weak disorder on the competition between antiferromagnetic order and superconductivity in a model for iron-based superconductors. Under the assumption of an approximate particle-hole symmetry we show that conventional $s^{++}$ superconductivity cannot be realized in the case of coexisting magnetic and superconductive orders, observed experimentally at intermediate doping levels. This result holds for arbitrary impurity concentrations, and, in particular, in the clean limit. The inclusion of disorder further amplifies the phase competition between itinerant antiferromagnetism and conventional superconductivity. In addition, we analyze the effect of disorder on the characteristic length scales of the two order parameters, and find that in a disordered sample the staggered moment fluctuates on shorter scales than the superconductive order parameter.

11 pages, 9 figures

References in corpus (10)

• High-temperature superconductivity in iron-based materials
• Hall effect and resistivity study of the magnetic transition, carrier content and Fermi liquid behavior in Ba(Fe(1-x) Cox)2As2
• Anisotropic Energy Gaps of Iron-based Superconductivity from Intra-band Quasiparticle Interference in LiFeAs
• Where Are the Extra d Electrons in Transition-Metal Substituted Fe Pnictides?
• Superconductivity and spin-density-waves in multi-band metals
• Enhancement of $T_c$ by disorder in underdoped iron pnictides
• Universal pair-breaking in transition metal-substituted iron-pnictide superconductors
• Electronic structure of single-crystalline Sr(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$ probed by x-ray absorption spectroscopy: Evidence for isovalent substitution of Fe${}^{2+}$ by Co${}^{2+}$
• Quasiclassical description of a superconductor with a spin density wave
• Mesoscopic gap fluctuations in an unconventional superconductor

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• Pair breaking due to orbital magnetism in iron-based superconductors
• Hidden Order as a Source of Interface Superconductivity
• Topological Defects in Systems with Two Competing Order Parameters: Application to Superconductors with Charge- and Spin-Density Waves
• Displacement-field-tunable superconductivity in an inversion-symmetric twisted van der Waals heterostructure
• Thermodynamics of $s_{\pm }-to-s_{++}$ transition in iron pnictides in the vicinity of the Born limit
• Reaching Quantum Critical Point by Adding Non-magnetic Disorder in Single Crystals of Superconductor $({\text{Ca}}_x{\text{Sr}}_{1-x}{)}_3{\text{Rh}}_4{\text{Sn}}_{13}$