Full-Potential Simulation of X-ray Raman Scattering Spectroscopy

Area of Science:

• Condensed matter physics
• Materials science
• Computational chemistry

Background:

• X-ray Raman scattering (XRS) is a powerful technique for probing electronic and atomic structure.
• Accurate theoretical calculations of XRS spectra are crucial for interpreting experimental results.
• Existing methods often rely on approximations for the potential, limiting their accuracy.

Purpose of the Study:

• To present a novel ab initio method for calculating X-ray Raman scattering spectra.
• To validate the method by comparing theoretical predictions with experimental data.
• To investigate the momentum transfer dependence of XRS spectra.

Main Methods:

• Ab initio calculation within the independent electron approximation.
• No approximations regarding the shape of the potential used.
• Application to F K-edge in LiF and B/N K-edges in hexagonal BN.

Main Results:

• Achieved good agreement between theoretical calculations and experimental data.
• Successfully reproduced the momentum transfer dependence for the studied systems.
• Demonstrated the method's capability to avoid approximations in potential shape.

Conclusions:

• The new ab initio method provides accurate X-ray Raman scattering spectra.
• The approach is well-suited for studying electronic states and local atomic structure.
• This work offers a reliable tool for analyzing XRS experiments.