Electron momentum spectroscopy of surfaces

TitleElectron momentum spectroscopy of surfaces
Publication TypeJournal Article
Year of Publication1999
AuthorsTixier, S., Y. Zheng, T. Tiedje, G. Cooper, and C. E. Brion
JournalSurface Review and Letters

Electron momentum spectroscopy [binary (e,2e) spectroscopy] using transmission geometry is a unique experimental tool for imaging the electron momentum distribution in gas phase samples as well as in thin films. In a solid, the electron momentum distribution is related to the band structure. Development of the (e,2e) technique using a more versatile reflection geometry is attractive since a much wider range of surfaces could be studied. The design of a new reflection (e,2e) spectrometer is presented. It is based on a two-step scattering model in which an incident electron successively reflects and ejects a valence electron from the surface. The scattered and ejected electrons are detected in coincidence and their energies and momentum vectors are simultaneously determined using a high throughput 90 degrees truncated spherical electrostatic analyzer and position-sensitive detectors.

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