The dispersion curves of the surface modes of a monolayer of xenon adsorbed on a single crystal of graphite have been measured by helium-atom scattering. A strong hybridization-induced splitting is observed between the localized adsorbate mode and the substrate Rayleigh mode, indicating a stronger adsorbate-substrate interaction than that for the case of rare gases on metals.
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Toennies et al. (1989) studied this question.
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