Evolution of Charge and Pair Density Modulations in Overdoped Bi2Sr2CuO6+delta

Abstract

One of the central issues concerning the mechanism of high temperature superconductivity in cuprates is the nature of the ubiquitous charge order and its implications to superconductivity. Here we use scanning tunneling microscopy to investigate the evolution of charge order from the optimally doped to strongly overdoped Bi2Sr2CuO6+δ cuprates. We find that with increasing hole concentration, the long-range checkerboard order gradually evolves into short-range glassy patterns consisting of diluted charge puddles. Each charge puddle has a unidirectional nematic internal structure, and exhibits clear pair density modulations as revealed by the spatial variations of superconducting coherence peak and gap depth. Both the charge puddles and the nematicity vanish completely in the strongly overdoped non-superconducting regime, when another type of short-range order with root2 * root2 periodicity emerges. These results shed important new lights on the intricate interplay between the intertwined orders and the superconducting phase of cuprates.

23 pages, 7 figures

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Cited by in corpus (14)

• Charge order at high temperature in cuprate superconductors
• Interplay between Pair Density Wave and a Nested Fermi Surface
• Self-consistent theory of $2\times 2$ pair density waves in kagome superconductors
• Theory of charge-6e condensed phase in Kagome lattice superconductors
• Pair-density-wave superconductivity: a microscopic model on 2D honeycomb lattice
• Checkerboard order state in superconducting FeSe/SrTiO3(001) monolayer
• Ubiquitous stripe phase and enhanced electron pairing in interfacial high-Tc superconductor FeSe/BaTiO${}_3$
• Robust Charge-Density Wave Correlations in Optimally-Doped YBa2Cu3Oy
• Phase coherence of charge-$6e$ superconductors via a frustrated Kagome XY antiferromagnet
• Inhomogeneity, Fluctuations, and Gap Filling in Overdoped Cuprates
• Transport properties of very overdoped nonsuperconducting Bi2Sr2CuO6+d thin films
• Spin-stripe order tied to the pseudogap phase in La1.8-xEu0.2SrxCuO4
• Enhanced pair-density-wave vertices in a bilayer Hubbard model at half-filling
• Pair-density-wave phase of strongly interacting electrons on the triangular lattice: A variational Monte Carlo study