Novel Materials Laboratory

Department of Physics

Department of Chemistry

Division of Materials Science and Engineering

Photoemission Spectroscopy

 An x-ray photon is incident on sample, and ejects either a core or valence electron

 If we measure the kinetic energy of the emitted electrons we can determine the electron binding energy

 In angle resolved photoemission spectroscopy (ARPES), we measure the momentum of emitted valence band electrons, and this gives valence band dispersion and Fermi surfaces

 In angle integrated photoemission, we integrate over the momentum of the emitted valence band electrons, and get the valence band density of states

 Finally, in x-ray photoemission spectroscopy (XPS), we measure the kinetic energy of the emitted core electrons, and determine core level binding energies