A resonant inelastic x-ray scattering study of the spin and charge excitations in the overdoped superconductor La1.77Sr0.23CuO4

Abstract

We present a resonant inelastic x-ray scattering (RIXS) study of spin and charge excitations in overdoped La1.77Sr0.23CuO4 along two high-symmetry directions. The line shape of these excitations is analyzed and they are shown to be highly overdamped. Their spectral weight and damping are found to be strongly momentum dependent. Qualitative agreement between these observations and a calculated RPA susceptibility is obtained for this overdoped compound, implying that a significant contribution to the RIXS signal stems from a continuum of charge excitations. Furthermore, this suggests that the spin-excitations in the overdoped regime can be captured qualitatively by an itinerant picture. Our calculations also predict a new low-energy spin excitation branch to exist along the nodal direction near the zone center. With the energy resolution of the present experiment, this branch is not resolvable but we show that next generation of high-resolution spectrometers will be able to test this prediction.

7 pages, 6 figures; accepted for publication in Phys. Rev. B

References in corpus (16)

• Spin-Orbital Separation in the quasi 1D Mott-insulator Sr2CuO3
• Two energy scales in the spin excitations of the high-T_c superconductor La${}_{2-x}$Sr${}_x$CuO${}_4$
• Anomalous High-Energy Spin Excitations in La2CuO4
• Magnetic neutron scattering in hole doped cuprate superconductors
• The ground state of heavily-overdoped non-superconducting La${}_{2-x}$Sr${}_x$CuO${}_4$
• Disappearance of antiferromagnetic spin excitations in over-doped La${}_{2-x}$Sr${}_x$CuO${}_4$
• High-energy magnetic excitations in Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$: Towards a unified description of the electronic and magnetic degrees of freedom in the cuprates
• The Persistence of High-Frequency Spin Fluctuations in Overdoped La${}_{2-x}$Sr${}_x$CuO${}_4$ ($x$=0.22)
• Field-induced soft-mode quantum phase transition in La${}_{1.855}$Sr${}_{0.145}$CuO${}_4$
• Spin-Orbit-Induced Orbital Excitations in Sr2RuO4 and Ca2RuO4: A Resonant Inelastic X-ray Scattering Study
• High-energy magnetic excitations in overdoped La${}_{2-x}$Sr${}_x$CuO${}_4$ studied by neutron and resonant inelastic X-ray scattering
• Momentum-resolved electron-phonon interaction in lead determined by neutron resonance spin-echo spectroscopy
• Magnetic-field-induced spin excitations and renormalized spin gap of the underdoped superconductor La${}_{1.895}$Sr${}_{0.105}$CuO${}_4$
• Itinerant effects and enhanced magnetic interactions in Bi-based multilayer cuprates
• Spin density wave induced disordering of the vortex lattice in superconducting La${}_{2-x}$Sr${}_x$CuO${}_4$
• Nodal Landau Fermi-Liquid Quasiparticles in Overdoped La${}_{1.77}$Sr${}_{0.23}$CuO${}_4$

Cited by in corpus (31)

• Dispersion, damping, and intensity of spin excitations in the single-layer (Bi,Pb)${}_2$(Sr,La)${}_2$CuO${}_{6+\delta }$ cuprate superconductor family
• Strain-Engineering Mott-Insulating La${}_2$CuO${}_4$
• Doping dependence of the magnetic excitations in La${}_{2-x}$Sr${}_x$CuO${}_4$
• Observation of a dispersive charge mode in hole-doped cuprates using resonant inelastic x-ray scattering at the oxygen K edge
• Spin-Orbital Excitations in Ca${}_2$RuO${}_4$ Revealed by Resonant Inelastic X-ray Scattering
• Anisotropic damping of the spin fluctuations in doped La2-xSrxCuO4 studied by resonant inelastic x-ray scattering
• Dispersive Magnetic and Electronic Excitations in Iridate Perovskites Probed with Oxygen $K$-Edge Resonant Inelastic X-ray Scattering
• Computing Resonant Inelastic X-Ray Scattering Spectra Using The Density Matrix Renormalization Group Method
• On the extraction of paramagnon excitations from resonant inelastic X-ray scattering experiments
• Damped spin excitations in a doped cuprate superconductor with orbital hybridization
• Local and collective magnetism of EuFe${}_2$As${}_2$
• Evolution of the magnetic excitations in NaOsO${}_3$ through its metal-insulator transition
• Dynamical spin susceptibility in La2CuO4 studied by resonant inelastic x-ray scattering
• Resonant inelastic x-ray scattering as a probe of band structure effects in cuprates
• Crossover from itinerant to localized magnetic excitations through the metal-insulator transition in NaOsO${}_{\text{3}}$
• Paramagnon dispersion in $\beta$-FeSe observed by Fe $L$-edge resonant inelastic x-ray scattering
• Reciprocity between local moments and collective magnetic excitations in the phase diagram of BaFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Competition between spin ordering and superconductivity near the pseudogap boundary in La2-xSrxCuO4: insights from NMR
• Signatures of strong correlation effects in RIXS on Cuprates
• Stripe Symmetry of Short-range Charge Density Waves in Cuprate Superconductors
• Unravelling the Nature of Spin Excitations Disentangled from Charge Contributions in a Doped Cuprate Superconductor
• Resonant Inelastic X-ray Scattering Study of Ca${}_3$Ru${}_2$O${}_7$
• Overdamped antiferromagnetic strange metal state in Sr${}_3$IrRuO${}_7$
• Depth-resolved resonant inelastic x-ray scattering at a superconductor/half-metallic ferromagnet interface through standing-wave excitation
• Post-growth annealing effects on charge and spin excitations in Nd${}_{2-x}$Ce${}_x$CuO${}_4$
• Spin and bond-charge excitation spectra in correlated electron systems near antiferromagnetic phase
• Strange metal from spin fluctuations in a cuprate superconductor
• Spin Dynamics in the t-t'-J Model: Dynamical Density-Matrix Renormalization Group Study
• Composite antiferromagnetic and orbital order with altermagnetic properties at a cuprate/manganite interface
• Dynamic Competition between Cooper-Pair and Spin-Density-Wave Condensation
• Strongly correlated model of acousticlike plasmons persisting across the phase diagram of cuprate superconductors