Unravelling the Nature of Spin Excitations Disentangled from Charge Contributions in a Doped Cuprate Superconductor

Abstract

The nature of the spin excitations in superconducting cuprates is a key question toward a unified understanding of the cuprate physics from long-range antiferromagnetism to superconductivity. The intense spin excitations up to the over-doped regime revealed by resonant inelastic X-ray scattering bring new insights as well as questions like how to understand their persistence or their relation to the collective excitations in ordered magnets (magnons). Here, we study the evolution of the spin excitations upon hole-doping the superconducting cuprate Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ by disentangling the spin from the charge excitations in the experimental cross section. We compare our experimental results against density matrix renormalization group calculations for a $t$-$J$-like model on a square lattice. Our results unambiguously confirm the persistence of the spin excitations, which are closely connected to the persistence of short-range magnetic correlations up to high doping. This suggests that the spin excitations in hole-doped cuprates are related to magnons -- albeit short-ranged.

24 pages, 14 figures

References in corpus (21)

• Inelastic Light Scattering From Correlated Electrons
• Ground State Phase Diagram of the $t$-$t^{\prime }$-$J$ model
• High-energy spin and charge excitations in electron-doped copper oxide superconductors
• Testing the itinerancy of spin dynamics in superconducting Bi2212
• 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
• Robust d-wave superconductivity in the square-lattice $t$-$J$ model
• Low energy theory of the t-t'-t''-U Hubbard Model at half-filling: interaction strengths in cuprate superconductors and an effective spin-only description of La_2CuO_4
• Polarization resolved Cu $L_3$-edge resonant inelastic x-ray scattering of orbital and spin excitations in NdBa${}_2$Cu${}_3$O${}_{7-\delta }$
• Non-Fermi liquid phase and linear-in-temperature scattering rate in overdoped two dimensional Hubbard model
• Doping dependence of the magnetic excitations in La${}_{2-x}$Sr${}_x$CuO${}_4$
• Crossover from Collective to Incoherent Spin Excitations in Superconducting Cuprates Probed by Detuned Resonant Inelastic X-ray Scattering
• High-energy magnetic excitations in overdoped La${}_{2-x}$Sr${}_x$CuO${}_4$ studied by neutron and resonant inelastic X-ray scattering
• Itinerant effects and enhanced magnetic interactions in Bi-based multilayer cuprates
• A unified theory of spin and charge excitations in high-$T_c$ cuprates: Quantitative comparison with experiment and interpretation
• Numerical Investigation of Spin Excitations in a Doped Spin Chain
• Decrease of d-wave pairing strength in spite of the persistence of magnetic excitations in the overdoped Hubbard model
• Resolving the nature of electronic excitations in resonant inelastic x-ray scattering
• Evidence for Kosterlitz-Thouless and 3D-xy critical behavior in Bi2212
• Signatures of pairing in the magnetic excitation spectrum of strongly correlated ladders
• Unravelling the Nature of Spin Excitations Disentangled from Charge Contributions in a Doped Cuprate Superconductor
• Quasiparticle metamorphosis in the random t-J model

Cited by in corpus (4)

• Unravelling the Nature of Spin Excitations Disentangled from Charge Contributions in a Doped Cuprate Superconductor
• Spin and bond-charge excitation spectra in correlated electron systems near antiferromagnetic phase
• Evolution of the magnetic excitations in electron-doped ${\mathrm{La}}_{2-x}{\mathrm{Ce}}_x{\mathrm{CuO}}_4$
• Rare collapse of fermionic quasiparticles upon coupling to local bosons