Abstract
The dynamics of an ordered (√7 × √7) layer of C6H6 on microcrystalline graphite (Grafoil, Carbopack) has been studied by neutron spectroscopy. A lattice dynamical calculation on the basis of currently used atom-atom interaction potentials was carried out which explains the experimental data. Similar experi- ments with C6H5 - CH3 in the incommensurate phase showed a strong quasi-elastic scattering intensity which is not present in the commensurate phase but which is also present in the case of a C6H5 - CD3 sample. According to distributions of scattered neutrons which have been computed for a 2-dimensional Debye lattice the quasi-elastic scattering intensity is attributed to acoustic modes in the incommensurate adlayer.
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Stockmeyer, R., Monkenbusch, M. (1982). Vibrations in Benzene and Toluene Monolayers on the Basal Plane of Graphite. In: Caudano, R., Gilles, JM., Lucas, A.A. (eds) Vibrations at Surfaces. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-4058-4_45
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DOI: https://doi.org/10.1007/978-1-4684-4058-4_45
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