About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Paper
BEEM spectroscopy at interfaces of Au, Ag, Cu, Mg and Ni films with n-GaP(110)
Abstract
A systematic investigation with ballistic-electron emission microscopy (BEEM) of local Schottky-barrier heights for ≅ 100 Å thick films of Au, Ag, Cu, Mg and Ni evaporated onto cleaved n-GaP(110) surfaces is presented. It is shown that the onset of the BEEM current follows a 5 2 power law, thermally broadened by the tip Fermi function. Schottky-barrier heights are found to be 1.41 ± 0.02 eV (Au), 1.27 ± 0.02 eV (Ag), 1.21 ± 0.03 eV (Cu), 1.03 ± 0.02 eV (Mg) and 1.06 ± 0.06 eV (Ni). In addition, the influence of varying injection geometry and tip contamination on the BEEM spectra is discussed. © 1991.