Spatially Inhomogeneous Competition between Superconductivity and the Charge Density Wave in YBa${}_2$Cu${}_3$O${}_{6.67}$

Abstract

The charge density wave in the high-temperature superconductor YBa${}_2$Cu${}_3$O${}_{7-x}$ (YBCO) is now known to have two different ordering tendencies differentiated by their $c$-axis correlations. These correspond to ferro- (F-CDW) and antiferro- (AF-CDW) couplings between CDW in neighbouring CuO${}_2$ bilayers. This discovery has prompted a number of fundamental questions. For example, how does superconductivity adjust to two competing orders and are either of these orders responsible for the electronic reconstruction? Here we use high-energy x-ray diffraction to study YBa${}_2$Cu${}_3$O${}_{6.67}$ as a function of magnetic field and temperature. We show that regions of the sample with F-CDW correlations suppress superconductivity more strongly than those with AF-CDW correlations. This implies that an inhomogeneous superconducting state exists, in which some regions show a weak or fragile form of superconductivity. By comparison of F-CDW and AF-CDW correlation lengths, it is furthermore concluded that F-CDW ordering is sufficiently long-range to modify the electronic structure. Our study thus suggests that F-CDW correlations have an important impact on superconducting and normal state properties of underdoped YBCO.

arXiv comment9 pages, 5 figures, and supplementary information

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Cited by in corpus (10)

• Cuprate superconductors as viewed through a striped lens
• Charge density waves in YBa${}_2$Cu${}_3$O${}_{6.67}$ probed by resonant x-ray scattering under uniaxial compression
• Locally commensurate charge-density wave with three-unit-cell periodicity in YBCO
• Characterization of photoinduced normal state through charge density wave in superconducting YBa${}_2$Cu${}_3$O${}_{6.67}$
• Using strain to uncover the interplay between two- and three-dimensional charge density waves in high-temperature superconducting YBa${}_2$Cu${}_3$O${}_{\mathrm{y}}$
• Stripe Symmetry of Short-range Charge Density Waves in Cuprate Superconductors
• In-plane Isotropy of the Low Energy Phonon Anomalies in YBa${}_2$Cu${}_3$O${}_{6+x}$
• $\pi$-Phase shift across stripes in a charge density wave system
• Metastability in Coexisting Competing Orders
• Dual role of stripe phase on superconducting correlation in a bilayer square lattice