Polarization-dependent C(K) near-edge x-ray-absorption fine structure of graphite

Abstract

Photoabsorption spectra of graphite at photon energies between 275 and 345 eV are presented. The spectra show dramatic changes as the angle, α, between the Poynting vector and the surface normal is varied. By varying α, one is able to select the symmetry of the final state (σ or π). Using this information, we are able to assign the spectral features to states predicted by published band-structure calculations.