Momentum Dependence of Charge Excitations in the Electron-Doped SuperconductorNd1.85Ce0.15CuO4: A Resonant Inelastic X-Ray Scattering Study

2004/12/17 by K. Ishii, Kenji Ishii, K. Tsutsui +18 · 2 citations
Earth and Planetary Sciences · Physics and Astronomy · #Advanced Condensed Matter Physics #High-pressure geophysics and materials #Physics of Superconductivity and Magnetism #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.94.207003

published as Phys. Rev. Lett. 94, 207003 (2005)

arxiv created 2004/12/17 · openalex publication_date 2005/05/26 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We report a resonant inelastic x-ray scattering (RIXS) study of charge excitations in the electron-doped high-T(c) superconductor Nd1.85 Ce0.15 CuO4. 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

• Beyond on-site Hubbard interaction in charge dynamics of cuprate superconductors
• Observation of spin-conserving two-spinon continuum in the S=1/2 antiferromagnetic chain system Sr₂CuO₃ using Cu K-edge resonant inelastic x-ray scattering

Related

• Data for article "Unveiling the Nature of Collective Charge Excitations in a Cuprate Superconductor"
• Quasiparticle Theory of Resonant Inelastic X-ray Scattering in high-T_c cuprates
• Charge response function probed by resonant inelastic x-ray scattering: the signature of electronic gaps of YBa₂Cu₃O_7-δ
• Probing Competing and Intertwined Orders with Resonant Inelastic x-ray Scattering in the Hole-Doped Cuprates
• Probing Magnetic Gap Collapse within a Three-band Model of Resonant inelastic x-ray scattering (RIXS) in the Cuprates