Locally commensurate charge-density wave with three-unit-cell periodicity in YBCO

Abstract

In order to identify the mechanism responsible for the formation of charge-density waves (CDW) in cuprate superconductors, it is important to understand which aspects of the CDW's microscopic structure are generic and which are material-dependent. Here, we show that, at the local scale probed by NMR, long-range CDW order in YBa2Cu3Oy is unidirectional with a commensurate period of three unit cells (lambda = 3b), implying that the incommensurability found in X-ray scattering is ensured by phase slips (discommensurations). Furthermore, NMR spectra reveal a predominant oxygen character of the CDW with an out-of-phase relationship between certain lattice sites but no specific signature of a secondary CDW with lambda = 6b associated with a putative pair-density wave. These results shed light on universal aspects of the cuprate CDW. In particular, its spatial profile appears to generically result from the interplay between an incommensurate tendency at long length scales, possibly related to properties of the Fermi surface, and local commensuration effects, due to electron-electron interactions or lock-in to the lattice.

Original submission (revised version available upon request)

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• Using strain to uncover the interplay between two- and three-dimensional charge density waves in high-temperature superconducting YBa${}_2$Cu${}_3$O${}_{\mathrm{y}}$
• Little-Parks like oscillations in lightly doped cuprate superconductors
• Signatures of two gaps in the spin susceptibility of a cuprate superconductor
• Quantum-Hall physics and three dimensions
• Stabilization of three-dimensional charge order through interplanar orbital hybridization in Pr${}_x$Y${}_{1-x}$Ba${}_2$Cu${}_3$O${}_{6+\delta }$
• Strain-induced long-range charge-density wave order in the optimally doped Bi${}_2$Sr${}_{2-x}$La${}_x$CuO${}_6$ superconductor
• Robust Charge-Density Wave Correlations in Optimally-Doped YBa2Cu3Oy
• Orbital selective commensurate modulations of the local density of states in ScV6Sn6 probed by nuclear spins
• Evidence for reduced periodic lattice distortion within the Sb-terminated surface layer of the kagome metal CsV${}_3$Sb${}_5$
• Spin-stripe order tied to the pseudogap phase in La1.8-xEu0.2SrxCuO4
• Bulk charge density wave and electron-phonon coupling in superconducting copper oxychlorides
• Frustrated phonon with charge density wave in vanadium Kagome metal
• Gradual emergence of superconductivity in underdoped LSCO
• Cuprates, Pnictides and Sulfosalts: Lessons in Functional Materials
• Raman Response of the Charge Density Wave in Cuprate Superconductors
• Paring density waves as the origin of a ring-like RIXS profile in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Superconductivity and the quasiparticle mass enhancement near the CDW critical point using Bethe-Salpeter method: Application to cuprates
• Unusual antiferromagnetic order and fluctuations in RbMn${}_6$Bi${}_5$