Nematicity as a probe of superconducting pairing in iron-based superconductors

Abstract

In several families of iron-based superconducting materials, a d-wave pairing instability may compete with the leading s-wave instability. Here we show that when both states have comparable free energies, superconducting and nematic degrees of freedom are strongly coupled. While nematic order causes a sharp non-analytic increase in $T_c$, nematic fluctuations can change the character of the s-wave to d-wave transition, favoring an intermediate state that does not break time-reversal symmetry but does break tetragonal symmetry. The coupling between superconductivity and nematicity is also manifested in the strong softening of the shear modulus across the superconducting transition. Our results show that nematicity can be used as a diagnostic tool to search for unconventional pairing states in iron pnictides and chalcogenides.

revised version; supplementary material included

References in corpus (17)

• Unconventional pairing originating from disconnected Fermi surfaces in superconducting LaFeAsO${}_{1-x}$F${}_x$}
• Evidence for an electron nematic phase transition in underdoped iron pnictide superconductors
• Magnetism, superconductivity, and pairing symmetry in Fe-based superconductors
• Theory of Electron Nematic Order in LaOFeAs
• Ising and Spin orders in Iron-based Superconductors
• Nematic and meta-nematic transitions in the iron pnictides
• Orbital Order and Spontaneous Orthorhombicity in Iron Pnictides
• Spin fluctuations and superconductivity in a 3D tight-binding model for BaFe2As2
• Self-Consistent Vertex Correction Analysis for Iron-Based Superconductors: Mechanism of Coulomb-Interaction-Driven Orbital Fluctuations
• Pairing State with a time-reversal symmetry breaking in FeAs based superconductors
• Manifestations of nematic degrees of freedom in the magnetic, elastic, and superconducting properties of the iron pnictides
• Inter-pocket pairing and gap symmetry in Fe-based superconductors with only electron pockets
• Valley density-wave and multiband superconductivity in Fe-pnictides
• Angle-resolved photoemission evidence of s-wave superconducting gap in KxFe2-ySe2 superconductor
• Suppression of superconductivity by Neel-type magnetic fluctuations in the iron pnictides
• Competition between stripe and checkerboard magnetic instabilities in Mn-doped BaFe2As2
• How many quantum phase transitions exist inside the superconducting dome of the iron pnictides?

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