Momentum Dependence of Charge Excitations in the Electron-Doped Superconductor Nd1.85Ce0.15CuO4: a RIXS Study

Abstract

We report a resonant inelastic x-ray scattering (RIXS) study of charge excitations in the electron-doped high-Tc superconductor Nd1.85Ce0.15CuO4. The intraband and interband excitations across the Fermi energy are separated for the first time by tuning the experimental conditions properly to measure charge excitations at low energy. A dispersion relation with q-dependent width emerges clearly in the intraband excitation, while the intensity of the interband excitation is concentrated around 2 eV near the zone center. The experimental results are consistent with theoretical calculation of the RIXS spectra based on the Hubbard model.

Cited by in corpus (29)

• A precise method for visualizing dispersive features in image plots
• High-energy spin and charge excitations in electron-doped copper oxide superconductors
• Polarization resolved Cu $L_3$-edge resonant inelastic x-ray scattering of orbital and spin excitations in NdBa${}_2$Cu${}_3$O${}_{7-\delta }$
• Unraveling the Nature of Charge Excitations in La${}_2$CuO${}_4$ with Momentum-Resolved Cu $K$-edge Resonant Inelastic X-ray Scattering
• EDRIXS: An open source toolkit for simulating spectra of resonant inelastic x-ray scattering
• Cu $K$-edge Resonant Inelastic X-Ray Scattering in Edge-Sharing Cuprates
• Exploring Quantum Materials with Resonant Inelastic X-Ray Scattering
• Polarization-analyzed resonant inelastic x-ray scattering of the orbital excitations in KCuF3
• Evolution of plasmon excitations across the phase diagram of the cuprate superconductor La${}_{2-x}$Sr${}_x$CuO${}_4$
• Anisotropic softening of collective charge modes in the vicinity of critical doping in a doped Mott insulator
• Momentum Dependent Charge Excitations of Two-Leg Ladder: Resonant Inelastic X-ray Scattering of (La,Sr,Ca)14Cu24O41
• Charge Excitations in Nd${}_{2-x}$Ce${}_x$CuO${}_4$ Observed with Resonant Inelastic X-ray Scattering: Comparison of Cu K-edge with Cu L${}_3$-edge
• Experimental signatures of phase interference and sub-femtosecond time dynamics on the incident energy axis of resonant inelastic X-ray scattering
• Lindhard and RPA susceptibility computations in extended momentum space in electron doped cuprates
• Electron self-energy from quantum charge fluctuations in the layered t-J model with long-range Coulomb interaction
• Theoretical insights into electronic nematic order, bond-charge orders, and plasmons in cuprate superconductors
• Coexisting pseudogap, charge transfer gap, and Mott gap energy scales in the resonant inelastic x-ray scattering spectra of electron-doped cuprates
• Analysis of Incident-Photon-Energy and Polarization Dependent Resonant Inelastic X-Ray Scattering from La${}_2$CuO${}_4$
• 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
• Plasmarons in high-temperature cuprate superconductors
• Charge Excitations in Cuprate and Nickelate in Resonant Inelastic X-Ray Scattering
• Momentum-resolved charge excitations in high-Tc cuprates studied by resonant inelastic x-ray scattering
• Strong-coupling theory of bilayer plasmon excitations
• Computing local multipoint correlators using the numerical renormalization group
• Observation of spin-conserving two-spinon continuum in the $S$=1/2 antiferromagnetic chain system Sr${}_2$CuO${}_3$ using Cu $K$-edge resonant inelastic x-ray scattering
• Strongly correlated model of acousticlike plasmons persisting across the phase diagram of cuprate superconductors
• Beyond on-site Hubbard interaction in charge dynamics of cuprate superconductors
• Theoretical perspectives on charge dynamics in high-temperature cuprate superconductors