Signature of quantum criticality in cuprates by charge density fluctuations

Abstract

The universality of the strange metal phase in many quantum materials is often attributed to the presence of a quantum critical point (QCP), a zero-temperature phase transition ruled by quantum fluctuations. In cuprates, where superconductivity hinders direct QCP observation, indirect evidence comes from the identification of fluctuations compatible with the strange metal phase. Here we show that the recently discovered charge density fluctuations (CDF) possess the right properties to be associated to a quantum phase transition. Using resonant x-ray scattering, we studied the CDF in two families of cuprate superconductors across a wide doping range (up to $p$=0.22). At $p^{\ast }\approx$0.19, the putative QCP, the CDF intensity peaks, and the characteristic energy $\Delta$ is minimum, marking a wedge-shaped region in the phase diagram indicative of a quantum critical behavior, albeit with anomalies. These findings strengthen the role of charge order in explaining strange metal phenomenology and provide insights into high-temperature superconductivity.

arXiv comment36 pages, 4 figures, 9 supplementary figures

References in corpus (54)

• Long-range incommensurate charge fluctuations in (Y,Nd)Ba2Cu3O(6+x)
• Direct observation of competition between superconductivity and charge density wave order in YBa2Cu3Oy
• Theory of Intertwined Orders in High Temperature Superconductors
• The doping dependence of T* - what is the real high-Tc phase diagram?
• Non Fermi-Liquid States and Pairing of a general Model of Copper-Oxide Metals
• Ubiquitous Interplay between Charge Ordering and High-Temperature Superconductivity in Cuprates
• Charge order driven by Fermi-arc instability in Bi2201
• Singular quasiparticle scattering in the proximity of charge instabilities
• Evaluation of CuO2 plane hole doping in YBa2Cu3O6+x single crystals
• Powerlaw optical conductivity with a constant phase angle in high Tc superconductors
• Resonant X-ray Scattering Study of Charge Density Wave Correlations in YBa${}_2$Cu${}_3$O${}_{6+x}$
• Universal $T$-linear resistivity and Planckian limit in overdoped cuprates
• Phase competition in trisected superconducting dome
• Linear in Temperature Resistivity and Associated Mysteries
• Universal sheet resistance and revised phase diagram of the cuprate high-temperature superconductors
• Non-Fermi-liquid behavior and d-wave superconductivity near the charge-density-wave quantum critical point
• Dynamical charge density fluctuations pervading the phase diagram of a Cu-based high-Tc superconductor
• Scale-invariant magnetoresistance in a cuprate superconductor
• Planckian dissipation, minimal viscosity and the transport in cuprate strange metals
• The superfluid density in cuprate high-Tc superconductors - a new paradigm
• Anomalous peak in the superconducting condensate density of cuprate high T_{c} superconductors at a unique critical doping state
• Dispersive charge density wave excitations and temperature dependent commensuration in Bi2Sr2CaCu2O8+δ
• Anomalous density fluctuations in a strange metal
• Incoherent transport across the strange metal regime of highly overdoped cuprates
• Hidden magnetic excitation in the pseudogap phase of a model cuprate superconductor
• Anomalous isotopic effect near the charge-ordering quantum criticality
• Charge-density-waves and superconductivity as an alternative to phase separation in the infinite-U Hubbard-Holstein model
• Where is the quantum critical point in the cuprate superconductors?
• Directly characterizing the relative strength and momentum dependence of electron-phonon coupling using resonant inelastic x-ray scattering
• Crossover from coherent to incoherent electronic excitations in the normal state of Bi2Sr2CaCu2O8
• The Doping Phase Diagram of Y1-xcaxba2(Cu1-yzny)3O7-d from Transport Measurements: Tracking the Pseudogap Below Tc (y = 0)
• Bond stretching phonon softening and angle-resolved photoemission kinks in optimally doped Bi2Sr1.6La0.4Cu2O6 superconductors
• Bad Metals from Fluctuating Density Waves
• Oxygen Phonon Branches in YBa2Cu3O7
• Charge order at high temperature in cuprate superconductors
• Spectroscopic Evidence for Charge Order Melting via Quantum Fluctuations in a Cuprate
• Experimental Determination of Momentum-Resolved Electron-Phonon Coupling
• Dispersion, damping, and intensity of spin excitations in the single-layer (Bi,Pb)${}_2$(Sr,La)${}_2$CuO${}_{6+\delta }$ cuprate superconductor family
• Multi-orbital charge density wave excitations and concomitant phonon anomalies in Bi${}_2$Sr${}_2$LaCuO${}_{6+\delta }$
• Polarization resolved Cu $L_3$-edge resonant inelastic x-ray scattering of orbital and spin excitations in NdBa${}_2$Cu${}_3$O${}_{7-\delta }$
• Strange metal behaviour from charge density fluctuations in cuprates
• Isotope Effect in the Superfluid Density of HTS Cuprates: Stripes, Pseudogap and Impurities
• Hole doping dependences of the magnetic penetration depth and vortex core size in YBa2Cu3Oy: Evidence for stripe correlations near 1/8 hole doping
• Non-Fermi liquid phase and linear-in-temperature scattering rate in overdoped two dimensional Hubbard model
• Restored strange metal phase through suppression of charge density waves in underdoped YBa${}_2$Cu${}_3$O${}_{7-\delta }$
• Probing the phase diagram of cuprates with YBa${}_2$Cu${}_3$O${}_{7-\delta }$ thin films and nanowires
• Signature of quantum criticality in cuprates by charge density fluctuations
• Determining the Electron-Phonon Coupling in Superconducting Cuprates by Resonant Inelastic X-ray Scattering: Methods and Results on Nd${}_{1+x}$Ba${}_{2-x}$Cu${}_3$O${}_{7-\delta }$
• Charge Order Lock-in by Electron-Phonon Coupling in La${}_{1.675}$Eu${}_{0.2}$Sr${}_{0.125}$CuO${}_4$
• Planckian Metal at a Doping-Induced Quantum Critical Point
• Spin fluctuations associated with the collapse of the pseudogap in a cuprate superconductor
• Fluctuating intertwined stripes in the strange metal regime of the Hubbard model
• Competition between spin ordering and superconductivity near the pseudogap boundary in La2-xSrxCuO4: insights from NMR
• Quantum fluctuations of charge order induce phonon softening in a superconducting cuprate

Cited by in corpus (21)

• Signature of quantum criticality in cuprates by charge density fluctuations
• Exploring Quantum Materials with Resonant Inelastic X-Ray Scattering
• Possible enhancement of the superconducting $T_c$ due to sharp Kohn-like soft phonon anomalies
• Low-energy quasi-circular electron correlations with charge order wavelength in ${\text{Bi}}_2{\text{Sr}}_2\text{Ca}{\text{Cu}}_2{\text{O}}_{8+\delta }$
• Theory of charge dynamics in bilayer electron system with long-range Coulomb interaction
• Decoupling of Static and Dynamic Charge Correlations revealed by Uniaxial Strain in a Cuprate Superconductor
• Robust Charge-Density Wave Correlations in Optimally-Doped YBa2Cu3Oy
• Spin and bond-charge excitation spectra in correlated electron systems near antiferromagnetic phase
• A Theoretical Study of Doping Evolution of Phonons in High-Temperature Cuprate Superconductors
• Geometric orthogonal metals: Hidden antiferromagnetism and pseudogap from fluctuating stripes
• Spin-stripe order tied to the pseudogap phase in La1.8-xEu0.2SrxCuO4
• Constrains on s and d components of electron boson coupling constants in one band d wave Eliashberg theory for high Tc superconductors
• Correlation between optical phonon softening and superconducting $T_c$ in YBa${}_2$Cu${}_3$O${}_x$ within $d$-wave Eliashberg theory
• Detection of a two-phonon mode in a cuprate superconductor via polarimetric RIXS
• Retaining Landau quasiparticles in the presence of realistic charge fluctuations in cuprates
• Dynamic charge order from strong correlations in the cuprates
• Strong-coupling theory of bilayer plasmon excitations
• The influence of phonon symmetry and electronic structure on the electron-phonon coupling momentum dependence in cuprates
• The doping evolution of the charge density wave and charge density fluctuations in La${}_{2-x}$Sr${}_x$CuO${}_4$
• Strain-induced structural change and nearly-commensurate diffuse scattering in the model high-temperature superconductor HgBa${}_2$CuO${}_{4+\delta }$
• Engineering underdoped CuO${}_2$ nanoribbons in nm-thick $a$-axis YBa${}_2$Cu${}_3$O${}_{7-\delta }$ films