Photoemission studies of LiCl, NaCl, and KCl

Abstract

Photoemission measurements were made on evaporated films of LiCl, NaCl, and KCl at photon energies 12-23 eV. The observed energy distributions of photoemitted electrons show structure that can be identified as high density of states in the valence and conduction bands. The effective widths of the valence bands of LiCl, NaCl, and KCl are found to be 5.0\ifmmode\pm\else\textpm\fi{}0.5, 3.1\ifmmode\pm\else\textpm\fi{}0.3, and 2.3\ifmmode\pm\else\textpm\fi{}0.3 eV, respectively. The experimental results are compared with the recently calculated band structures for these materials.