Crossover from Collective to Incoherent Spin Excitations in Superconducting Cuprates Probed by Detuned Resonant Inelastic X-ray Scattering

Abstract

Spin excitations in the overdoped high temperature superconductors Tl${}_2$Ba${}_2$CuO${}_{6+\delta }$ and (Bi,Pb)${}_2$(Sr,La)${}_2$CuO${}_{6+\delta }$ were investigated by resonant inelastic x-ray scattering (RIXS) as functions of doping and detuning of the incoming photon energy above the Cu-$L_3$ absorption peak. The RIXS spectra at optimal doping are dominated by a paramagnon feature with peak energy independent of photon energy, similar to prior results on underdoped cuprates. Beyond optimal doping, the RIXS data indicate a sharp crossover to a regime with a strong contribution from incoherent particle/hole excitations whose maximum shows a fluorescence-like shift upon detuning. The spectra of both compound families are closely similar, and their salient features are reproduced by exact-diagonalization calculations of the single-band Hubbard model on a finite cluster. The results are discussed in the light of recent transport experiments indicating a quantum phase transition near optimal doping.

arXiv comment6 pages, 3 figures, accepted in Physical Review Letters

References in corpus (25)

• A Common Thread: the pairing interaction for the unconventional superconductors
• Resonant Inelastic X-ray Scattering Studies of Elementary Excitations
• Controlling many-body states by the electric-field effect in a two-dimensional material
• Intense paramagnon excitations in a large family of high-temperature superconductors
• Change of carrier density at the pseudogap critical point of a cuprate superconductor
• Ubiquitous signatures of nematic quantum criticality in optimally doped Fe-based superconductors
• Ground state oxygen holes and the metal-insulator transition in the negative charge transfer rare-earth nickelates
• Persistence of magnetic excitations in La2-xSrxCuO4 from the undoped insulator to the heavily overdoped non-superconducting metal
• Efficient real frequency solver for dynamical mean field theory
• Progress in Neutron Scattering Studies of Spin Excitations in High-Tc Cuprates
• Quasiparticle mass enhancement approaching optimal doping in a high-Tc superconductor
• Energy and symmetry of $dd$ excitations in undoped layered cuprates measured by Cu $L_3$ resonant inelastic x-ray scattering
• Bands, resonances, edge singularities and excitons in core level spectroscopy investigated within the dynamical mean field theory
• Loss of nodal quasiparticle integrity in underdoped YBa2Cu3O6+x
• Dispersive spin excitations in highly overdoped cuprates revealed by resonant inelastic x-ray scattering
• Using RIXS to uncover elementary charge and spin excitations in correlated materials
• The simultaneous measurement of energy and linear polarization of the scattered radiation in resonant inelastic soft x-ray scattering
• Collapse of ferromagnetism and Fermi surface instability near reentrant superconductivity of URhGe
• Doping evolution of spin and charge excitations in the Hubbard model
• Raman and fluorescence characteristics of resonant inelastic X-ray scattering from doped superconducting cuprates
• Growth, characterization and physical properties of high-quality large single crystals of Bi${}_2$Sr${}_{2-x}$La${}_x$CuO${}_6$ high-temperature superconductors
• Resonant inelastic x-ray scattering as a probe of band structure effects in cuprates
• Incident-energy-dependent spectral weight of resonant inelastic x-ray scattering in doped cuprates
• Encapsulated Single Crystal Growth and Annealing of the High-Temperature Superconductor Tl-2201
• Signatures of strong correlation effects in RIXS on Cuprates

Cited by in corpus (28)

• Three dimensional collective charge excitations in electron-doped cuprate superconductors
• Detection of Acoustic Plasmons in Hole-Doped Lanthanum and Bismuth Cuprate Superconductors Using Resonant Inelastic X-Ray Scattering
• Dispersion, damping, and intensity of spin excitations in the single-layer (Bi,Pb)${}_2$(Sr,La)${}_2$CuO${}_{6+\delta }$ cuprate superconductor family
• Polarization resolved Cu $L_3$-edge resonant inelastic x-ray scattering of orbital and spin excitations in NdBa${}_2$Cu${}_3$O${}_{7-\delta }$
• Doping evolution of the charge excitations and electron correlations in electron-doped superconducting La${}_{2-x}$Ce${}_x$CuO${}_4$
• Paramagnons and high-temperature superconductivity in mercury-based cuprates
• Superconductivity in high-$T_c$ and related strongly correlated systems from variational perspective: Beyond mean field theory
• Acoustic plasmons and conducting carriers in hole-doped cuprate superconductors
• RIXS studies of magnons and bimagnons in the lightly doped cuprate La2-xSrxCuO4
• Recent advances in high-throughput superconductivity research
• Quantum spin fluctuations and evolution of electronic structure in cuprates
• Dynamical spin susceptibility in La2CuO4 studied by resonant inelastic x-ray scattering
• A unified theory of spin and charge excitations in high-$T_c$ cuprates: Quantitative comparison with experiment and interpretation
• Description of resonant inelastic x-ray scattering in correlated metals
• Non-perturbative series expansion of Green's functions: The Anatomy of Resonant Inelastic X-Ray Scattering in Doped Hubbard Model
• Competition between spin ordering and superconductivity near the pseudogap boundary in La2-xSrxCuO4: insights from NMR
• Influence of Magnetism and Correlation on the Spectral Properties of Doped Mott Insulators
• Anisotropic magnetic excitations and incipient Néel order in Ba(Fe${}_{1-x}$Mn${}_x$)${}_2$As${}_2$
• Superfluid density and two-component conductivity in hole-doped cuprates
• Robust spin and charge excitations throughout high-$T_c$-cuprate phase diagram from incipient Mottness
• Spin and charge excitations in the correlated multiband metal Ca3Ru2O7
• Unravelling the Nature of Spin Excitations Disentangled from Charge Contributions in a Doped Cuprate Superconductor
• Universal collective modes from strong electronic correlations: Modified $1/{\mathcal{N}}_f$ theory with application to high-$T_c$ cuprates
• Spin and bond-charge excitation spectra in correlated electron systems near antiferromagnetic phase
• Strange metal from spin fluctuations in a cuprate superconductor
• Collective spin and charge excitations in the $t$-$J$-$U$ model of high-$T_c$ cuprates
• Strongly correlated model of acousticlike plasmons persisting across the phase diagram of cuprate superconductors
• Electron-hole asymmetry of quantum collective excitations in high-$T_c$ copper oxides