Nonlinear uniaxial pressure dependence of $T_c$ in iron-based superconductors

Abstract

We have systematically studied the effects of in-plane uniaxial pressure $p$ on the superconducting transition temperature $T_c$ in many iron-based superconductors. The change of $T_c$ with $p$ is composed of linear and nonlinear components. The latter can be described as a quadratic term plus a much smaller fourth-order term. In contrast to the linear component, the nonlinear $p$ dependence of $T_c$ displays a pronounced in-plane anisotropy, which is similar to the anisotropic response of the resistivity to $p$. As a result, it can be attributed to the coupling between the superconducting and nematic orders, in accordance with the expectations of a phenomenological Landau theory. Our results provide direct evidences for the interplay between nematic fluctuations and superconductivity, which may be a common behavior in iron-based superconductors.

arXiv comment6 pages, 7 figures

References in corpus (28)

• Nematic order in iron superconductors - who is in the driver's seat?
• Nematic Fermi Fluids in Condensed Matter Physics
• Broken rotational symmetry in the pseudogap phase of a high-Tc superconductor
• Ubiquitous signatures of nematic quantum criticality in optimally doped Fe-based superconductors
• Enhancement of superconductivity near a nematic quantum critical point
• Strong Peak in $T_c$ of Sr${}_2$RuO${}_4$ Under Uniaxial Pressure
• Are non-Fermi-liquids stable to Cooper pairing?
• Lack of coupling between superconductivity and orthorhombic distortion in stoichiometric single-crystalline FeSe
• Thermodynamic evidence for nematic phase transition at the onset of pseudogap in YBa${}_2$Cu${}_3$O${}_y$
• Nematic quantum critical point without magnetism in FeSe1-xSx superconductors
• Superconductivity and non-Fermi liquid behavior near a nematic quantum critical point
• Superconductivity-induced reentrance of orthorhombic distortion in Ba1-xKxFe2As2
• Nematicity as a probe of superconducting pairing in iron-based superconductors
• Ising nematic quantum critical point in a metal: a Monte Carlo study
• A magnetic origin for high temperature superconductivity in iron pnictides
• Critical Quadrupole Fluctuations and Collective Modes in Iron Pnictide Superconductors
• Superconductivity from orbital nematic fluctuations
• Superconductivity in FeSe thin films driven by the interplay between nematic fluctuations and spin-orbit coupling
• Thermal expansion and Grüneisen parameters of Ba(Fe1-xCox)2As2 - a thermodynamic quest for quantum criticality
• Nematic superconducting state in iron pnictide superconductors
• Unified phase diagram for iron-based superconductors
• Thermodynamic phase diagram and phase competition in BaFe2(As1-xPx)2 studied by thermal expansion
• How many quantum phase transitions exist inside the superconducting dome of the iron pnictides?
• Nematic Quantum Critical Fluctuations in BaFe${}_{2-x}$Ni${}_x$As${}_2$
• Superconductivity and Nematic Fluctuations in a model of FeSe monolayers: A Determinant Quantum Monte Carlo Study
• Superconductivity-enhanced Nematicity and '$s+d$' Gap Symmetry in Fe(Se${}_{1-x}$S${}_x$)
• Critical divergence of the symmetric ($A_{1g}$) nonlinear elastoresistance near the nematic transition in an iron-based superconductor
• Anisotropic Dependence of Superconductivity on Uniaxial Pressure in CeIrIn5

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