Critical divergence of the symmetric ($A_{1g}$) nonlinear elastoresistance near the nematic transition in an iron-based superconductor

Abstract

We report the observation of a nonlinear elastoresistivity response for the prototypical underdoped iron pnictide Ba(Fe${}_{0.975}$Co${}_{0.025}$)${}_2$As${}_2$. Our measurements reveal a large quadratic term in the isotropic ($A_{1g}$) electronic response that was produced by a purely shear ($B_{2g}$) strain. The divergence of this quantity upon cooling towards the structural phase transition reflects the temperature dependence of the nematic susceptibility. This observation shows that nematic fluctuations play a significant role in determining even the isotropic properties of this family of compounds.

References in corpus (13)

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• Measurement of the elastoresistivity coefficients of the underdoped iron-arsenide Ba(Fe${}_{0.975}$Co${}_{0.025}$)${}_2$As${}_2$
• Nematic fluctuations and the magneto-structural phase transition in $\mathrm{Ba}(\mathrm{F}{\mathrm{e}}_{1-\mathrm{x}}\mathrm{C}{\mathrm{o}}_{\mathrm{x}}{)}_2\mathrm{A}{\mathrm{s}}_2$
• Effect of disorder on the resistivity anisotropy near the electronic nematic phase transition in pure and electron-doped BaFe${}_2$As${}_2$
• Symmetry constraints on the elastoresistivity tensor

Cited by in corpus (19)

• Momentum Dependence of the Nematic Order Parameter in Iron-Based Superconductors
• Unveiling Hidden Orders: Magnetostriction as a Probe of Multipolar-Ordered States
• Micron-scale measurements of low anisotropic strain response of local $T_c$ in Sr${}_2$RuO${}_4$
• The relationship between transport anisotropy and nematicity in FeSe
• Elastocaloric signature of nematic fluctuations
• Hydrostatic and uniaxial pressure tuning of iron-based superconductors: Insights into superconductivity, magnetism, nematicity and collapsed tetragonal transitions
• The transport-structural correspondence across the nematic phase transition probed by elasto-x-ray diffraction
• Quantitative characterization of short-range orthorhombic fluctuations in FeSe through pair distribution function analysis
• Elastoresistivity in the incommensurate charge density wave phase of BaNi${}_{\text{2}}$(As${}_{\text{1-x}}$P${}_{\text{x}}$)${}_{\text{2}}$
• Emerging symmetric strain response and weakening nematic fluctuations in strongly hole-doped iron-based superconductors
• Widespread orthorhombic fluctuations in the (Sr,Na)Fe${}_2$As${}_2$ family of superconductors
• Dominant in-plane symmetric elastoresistance in CsFe2As2
• Electronic nematicity in URu2Si2 revisited
• Measurement of Elastoresistivity at Finite Frequency by Amplitude Demodulation
• Nonlinear uniaxial pressure dependence of $T_c$ in iron-based superconductors
• Growth of nematic susceptibility in the field-induced normal state of an iron-based superconductor revealed by elastoresistivity measurements in a 65 T pulsed magnet
• Measurements of elastoresistance under pressure by combining in-situ tunable quasi-uniaxial stress with hydrostatic pressure
• Increase of critical current density in FeSe superconductor by strain effect
• Divergence of the quadrupole-strain susceptibility of YbRu${}_2$Ge${}_2$; a local moment realization of electronic nematicity