XPS and Auger processes in 2D materials

GERVASONI J. L.; SEGUI, S.

Conferencia; International Symposium on Correlation, Polarization and Ionization in Atomic and Molecular Collisions (vCOPIAMC); 2021

In this work, we analyze the process of excitation of plasmons during the emission of electrons in the proximity of two-dimensional (2D) material surfaces. We detail the effects due to the interaction between an electron and a stationary positive ion (or atomic hole) in the vicinity of the metal surface. We use the dielectric response of the material and the specular reflection model for the case of flat surfaces. In particular, we study how the interaction of the electron-hole pair can influence the loss of energy of the emerging electron. The method described here is useful to understand the excitation spectra of electrons in 2-dimensional materials, (different from those of the same volumetric material).