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    Angular Dispersion of Fuchs-Kliewer Modes in GaAs(100) by Digital HREELS

Angular Dispersion of Fuchs-Kliewer Modes in GaAs(100) by Digital HREELS

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High Resolution Electron Energy Loss Spectroscopy (HREELS) has been used to study Fermi-level pinning and surface phonon-plasmon properties of GaAs(100). The angular dispersion (energy loss vs electron beam incidence angle) of surface optical phonons (Fuchs-Kliewer modes) in GaAs(100) has been determined with a resolution at room temperature of 10 meV.