Coexisting pseudogap, charge transfer gap, and Mott gap energy scales in the resonant inelastic x-ray scattering spectra of electron-doped cuprates

Abstract

We present a computation of Cu K-edge resonant inelastic x-ray scattering (RIXS) spectra for electron-doped cuprates which includes coupling to bosonic fluctuations. Comparison with experiment over a wide range of energy and momentum transfers allows us to identify the signatures of three key normal-state energy scales: the pseudogap, charge transfer gap, and Mott gap. The calculations involve a three band Hubbard Hamiltonian based on Cu $d_{x^2-y^2}$ and O $p_x$, $p_y$ orbitals, with a self-energy correction which arises due to spin and charge fluctuations. Our theory reproduces characteristic features e.g., gap collapse, large spectral weight broadening, and spectral weight transfer as a function of doping, as seen in experiments.

arXiv comment5 pages, 4 figures

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Cited by in corpus (5)

• Pseudogap from ARPES experiment: three gaps in cuprates and topological superconductivity
• Intermediate Coupling Model of the Cuprates
• Enhanced charge excitations in electron-doped cuprates by resonant inelastic x-ray scattering
• Electronic State of T'-Pr${}_{1.3-x}$La${}_{0.7}$Ce${}_x$CuO${}_4$ ($x=0.10$) Studied by Compton Scattering
• Phase-Space Approach to Wannier Pairing and Bogoliubov Orbitals in Square-Octagon Lattices