X-ray absorption near-edge spectra of overdoped La_2-xSr_xCuO_4 high-T_c superconductors

Abstract

We present results for realistic modeling of the x-ray absorption near edge structure (XANES) of the overdoped high-T_c superconductor La_2-xSr_xCuO_4 in the hole doping range x = 0.20-0.30. Our computations are based on a real-space Green's function approach in which strong-correlation effects are taken into account in terms of a doping-dependent self-energy. The predicted O K-edge XANES is found to be in good accord with the corresponding experimental results in this overdoped regime. We find that the low energy spectra are dominated by the contribution of O-atoms in the cuprate planes, with little contribution from apical O-atoms.

References in corpus (8)

• Optical conductivity and the correlation strength of high temperature copper-oxide superconductors
• Measurement of x-ray absorption spectra of overdoped high-temperature cuprate superconductors: Inapplicability of the single-band Hubbard model
• Paramagnon-induced dispersion anomalies in the cuprates
• Optical model-solution to the competition between a pseudogap phase and a Mott-gap phase in high-temperature cuprate superconductors
• Failure of t-J models in describing doping evolution of spectral weight in x-ray scattering, optical and photoemission spectra of the cuprates
• Anisotropic softening of collective charge modes in the vicinity of critical doping in a doped Mott insulator
• Theory of oxygen K-edge x-ray absorption spectra of cuprates
• Spectral weight of doping-induced states in the 2D Hubbard model

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• Different doping from apical and planar oxygen vacancies in Ba${}_2$CuO${}_{4-\delta }$ and La${}_2$CuO${}_{4-\delta }$
• GW quasiparticle calculations with spin-orbit coupling for the light actinides
• Bulk Fermi surface and momentum density in heavily doped La${}_{2-x}$Sr${}_x$CuO${}_4$ using high resolution Compton scattering and positron annihilation spectroscopies
• Spectral evolution with doping of an antiferromagnetic Mott state