A slab calculation was made of the surface phonon dispersion curves for Si(111)-(2 x 1) within the framework of bond charge model dynamics. The results were in very good agreement with then-existing experimental data and provided an interpretation of the dynamic structures of this surface; based upon the relationship with the unreconstructed one. This perspective contradicted a published analysis which had pointed out the uniqueness of chain dynamics.

Surface Phonons in Si(111) 2 x 1 - Folding and Chain Effects of the Reconstruction. L.Miglio, P.Santini, P.Ruggerone, G.Benedek: Physica Scripta, 1989, T25, 305-8