A one-dimensional model is presented for surface phonon scattering into surface phonon channels by atomic inhomogeneities along a high symmetry direction in a solid surface. The model yields characteristic resonances over the full Brillouin zone of the model linear chain, for a monoatomic step and an adatom, at the limit of low concentrations where the approximation of an isolated inhomogeneity holds. Additional resonances are found near the step edges for a symmetric double step, these indicate weak localization of surface phonons on a slightly disordered surface. The theoretical results can, in principle, be tested by electron energy loss spectroscopy and He atom surface scattering.
ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials