Resonant inelastic x-ray scattering in metals: A diagrammatic approach

TL;DR: In this article, a numerical solution of the polaron problem by a novel Monte Carlo method is presented, where a process which generates continuous random variables with a distribution function coinciding exactly with the Green function is constructed, and the spectrum of polaron energy is extracted from the asymptotic behavior of the green function.

TL;DR: Resonant inelastic X-ray scattering on electron-doped copper oxide superconductors reveals a three-dimensional charge collective mode, which has properties suggestive of the long-sought acoustic plasmon.

TL;DR: The high-Tc cuprate superconductors are close to antiferromagnetic order and excitation spectra composed of particle-hole excitations suggest that superconductivity emerges from a coherent treatment of electronic spin and charge in the form of quasiparticles with very strong magnetic correlations.

TL;DR: In this article, the authors used resonant inelastic x-ray scattering (RIXS) with polarization analysis to uncover the pure charge character of a recently discovered collective mode in electron-doped cuprates.