Prevailing charge order in overdoped cuprates beyond the superconducting dome

Abstract

The extremely overdoped cuprates are generally considered to be Fermi liquid metals without exotic orders, whereas the underdoped cuprates harbor intertwined states. Contrary to this conventional wisdom, using Cu $L_3$ edge and O $K$ edge resonant x-ray scattering, we reveal a charge order (CO) in overdoped La${}_{2-x}$Sr${}_x$CuO${}_4$ (0.35 $\le$ x $\le$ 0.6) beyond the superconducting dome. This CO has a periodicity of $\sim$ 6 lattice units with correlation lengths of $\sim 3-20$ lattice units. It shows similar in-plane momentum and polarization dependence and dispersive excitations as the CO of underdoped cuprates, but its maximum intensity differs along the c-direction and persists up to 300 K. This CO cannot be explained by either the Fermi surface instability or the doped Hubbard model and its origin remains to be understood. Our results suggest that CO is prevailing in the overdoped metallic regime and superconductivity emerges out of the CO phase upon decreasing hole carriers.

6 pages, 4 figures

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Cited by in corpus (10)

• Exploring Quantum Materials with Resonant Inelastic X-Ray Scattering
• From non-metal to strange metal at the stripe-percolation transition in La${}_{2-x}$Sr${}_x$CuO${}_4$
• Correlation between unconventional superconductivity and strange metallicity revealed by operando superfluid density measurements
• Robust Charge-Density Wave Correlations in Optimally-Doped YBa2Cu3Oy
• Spin-stripe order tied to the pseudogap phase in La1.8-xEu0.2SrxCuO4
• A Theoretical Study of Doping Evolution of Phonons in High-Temperature Cuprate Superconductors
• Charge-Density-Wave State in Extremely Overdoped Cuprates Driven by Phonons
• Anisotropic electron damping and energy gap in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Bimagnon dispersion of La2CuO4 probed by resonant inelastic X-ray scattering
• Strongly correlated model of acousticlike plasmons persisting across the phase diagram of cuprate superconductors