Resonant Inelastic X-Ray Scattering at the K Edge of Ge

TL;DR

This study investigates the RIXS spectra at the Ge K edge, revealing a momentum-independent peak structure and confirming experimental results with band structure calculations, advancing understanding of electron-hole excitations.

Contribution

The paper provides the first systematic RIXS measurements at the Ge K edge and demonstrates the spectral shape's consistency with band structure calculations.

Findings

Single peak structure in RIXS spectra independent of momentum

Good agreement between experimental data and band structure calculations

Spectral shape clarifies electron-hole excitation mechanisms

Abstract

We study the resonant inelastic x-ray scattering (RIXS) at the $K$ edge of Ge. We measure RIXS spectra with systematically varying momenta in the final state. The spectra are a measure of exciting an electron-hole pair. We find a single peak structure (except the elastic peak) as a function of photon energy, which is nearly independent of final-state momenta. We analyze the experimental data by means of the band structure calculation. The calculation reproduces well the experimental shape, clarifying the implication of the spectral shape.