Signatures of strong correlation effects in RIXS on Cuprates

Abstract

Recently, spin excitations in doped cuprates are measured using the resonant inelastic X-ray scattering (RIXS). The paramagnon dispersions show the large hardening effect in the electron-doped systems and seemingly doping-independence in the hole-doped systems, with the energy scales comparable to that of the antiferromagnetic magnons. This anomalous hardening effect was partially explained by using the strong coupling t-J model but with a three-site term(Nature communications 5, 3314 (2014)). However we show that hardening effect is a signature of strong coupling physics even without including this extra term. By considering the t-t'-t"-J model and using the Slave-Boson (SB) mean field theory, we obtain, via the spin-spin susceptibility, the spin excitations in qualitative agreement with the experiments. These anomalies is mainly due to the doping-dependent bandwidth. We further discuss the interplay between particle-hole-like and paramagnon-like excitations in the RIXS measurements.

arXiv comment7 pages, 6 figures

References in corpus (27)

• Resonant Inelastic X-ray Scattering Studies of Elementary Excitations
• Intense paramagnon excitations in a large family of high-temperature superconductors
• High Temperature Superconductivity in Iron Pnictides and Chalcogenides
• Persistence of magnetic excitations in La2-xSrxCuO4 from the undoped insulator to the heavily overdoped non-superconducting metal
• Slave Boson Approach to The Neutron Scattering in YBCO Superconductors
• Persistent spin excitations in doped antiferromagnets revealed by resonant inelastic light scattering
• Asymmetry of collective excitations in electron and hole doped cuprate superconductors
• High-energy spin and charge excitations in electron-doped copper oxide superconductors
• Dispersive spin excitations in highly overdoped cuprates revealed by resonant inelastic x-ray scattering
• 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
• Renormalized mean-field theory of the neutron scattering in cuprate superconductors
• Insights into the High Temperature Superconducting Cuprates from Resonant Inelastic X-ray Scattering
• Dispersion of a single hole in the t-J model
• Using RIXS to uncover elementary charge and spin excitations in correlated materials
• Theory for Slightly Doped Antiferromagnetic Mott Insulators
• A resonant inelastic x-ray scattering study of the spin and charge excitations in the overdoped superconductor La1.77Sr0.23CuO4
• Fermi surface evolution in the antiferromagnetic state for the electron-doped t-t'-t''-J model
• High-energy magnetic excitations in overdoped La${}_{2-x}$Sr${}_x$CuO${}_4$ studied by neutron and resonant inelastic X-ray scattering
• A Consistent Picture for Resonance Neutron Peak and ARPES Spectra in High-Tc Superconductors
• Magnetic excitations and phonons simultaneously studied by resonant inelastic x-ray scattering in optimally doped Bi${}_{1.5}$Pb${}_{0.55}$Sr${}_{1.6}$La${}_{0.4}$CuO${}_{6+\delta }$
• Raman and fluorescence characteristics of resonant inelastic X-ray scattering from doped superconducting cuprates
• Itinerant effects and enhanced magnetic interactions in Bi-based multilayer cuprates
• Doping dependence of the resonance peak and incommensuration in high-$T_c$ superconductors
• Spin dynamics in the antiferromagnetic phase for electron-doped cuprate superconductors
• Implications of Resonant Inelastic X-ray Scattering Data for Theoretical Models of Cuprates
• Self-energy effects in electronic Raman spectra of doped cuprates due to magnetic fluctuations
• Superconducting condensation energy and neutron resonance in high-Tc superconductors

Cited by in corpus (9)

• 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
• Time-Resolved Resonant Inelastic X-Ray Scattering in a Pumped Mott Insulator
• Quantum spin fluctuations and evolution of electronic structure in cuprates
• Numerical Investigation of Spin Excitations in a Doped Spin Chain
• Influence of Magnetism and Correlation on the Spectral Properties of Doped Mott Insulators
• Spin and bond-charge excitation spectra in correlated electron systems near antiferromagnetic phase
• Evolution of the magnetic excitations in electron-doped ${\mathrm{La}}_{2-x}{\mathrm{Ce}}_x{\mathrm{CuO}}_4$
• Beyond on-site Hubbard interaction in charge dynamics of cuprate superconductors