Lindhard and RPA susceptibility computations in extended momentum space in electron doped cuprates

Abstract

We present an approximation for efficient calculation of the Lindhard susceptibility ${\chi }^L(q,\omega )$ in a periodic system through the use of simple products of real space functions and the fast Fourier transform (FFT). The method is illustrated by providing ${\chi }^L(q,\omega )$ results for the electron doped cuprate Nd${}_{2-x}$Ce${}_x$CuO${}_4$ extended over several Brillouin zones. These results are relevant for interpreting inelastic X-ray scattering spectra from cuprates.

6 pages, 6 figures, accepted in Physical Review B

References in corpus (5)

• Momentum Dependence of Charge Excitations in the Electron-Doped Superconductor Nd1.85Ce0.15CuO4: a RIXS Study
• Gutzwiller Magnetic Phase Diagram of the Cuprates
• Anomalous Angular Dependence of the Dynamic Structure Factor near Bragg Reflections: Graphite
• Anisotropic softening of collective charge modes in the vicinity of critical doping in a doped Mott insulator
• Renormalization of f-levels away from the Fermi energy in electron excitation spectroscopies: Density functional results of Nd${}_{2-x}$Ce${}_x$CuO${}_4$

Cited by in corpus (3)

• Intermediate Coupling Model of the Cuprates
• Proposed parameter-free model for interpreting the measured positron annihilation spectra of materials using a generalized gradient approximation
• Inelastic X-ray scattering from valence electrons near absorption edges of FeTe and TiSe${}_2$