Tuning of Charge Order by Uniaxial Stress in a Cuprate Superconductor

Abstract

Strongly correlated electron materials are often characterized by competition and interplay of multiple quantum states. For example, in high-temperature cuprate superconductors unconventional superconductivity, spin- and charge-density wave orders coexist. A key question is whether competing states coexist on the atomic scale or if they segregate into distinct 'islands'. Using X-ray diffraction, we investigate the competition between charge order and superconductivity in the archetypal cuprate La(2-x)BaxCuO4, around the x = 1/8-doping, where uniaxial stress restores optimal 3D superconductivity at approximately 0.06 GPa. We find that the charge order peaks and the correlation length along the stripe are strongly reduced up to the critical stress, above which they stay constant. Simultaneously, the charge order onset temperature only shows a modest decrease. Our findings suggest that optimal 3D superconductivity is not linked to the absence of charge stripes but instead requires their arrangement into smaller 'islands'. Our results provide insight into the length scales over which the interplay between superconductivity and charge order takes place.

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Cited by in corpus (5)

• Emergent properties and the multiscale characterization challenge in condensed matter, from crystals to complex materials: a Review
• Tuning of Charge Order by Uniaxial Stress in a Cuprate Superconductor
• Structural Phase Separation and Enhanced Superconductivity in La1.875Ba0.125CuO4 under Uniaxial Strain
• Cuprates, Pnictides and Sulfosalts: Lessons in Functional Materials
• Contrasting $c$-axis and in-plane uniaxial stress effects on superconductivity and stripe order in La${}_{1.885}$Ba${}_{0.115}$CuO${}_4$