Structure determination of theGe(111)c(2×8)surface by medium-energy ion scattering

Abstract
The Ge(111)c(2×8) and the Si(111)-(7×7) reconstructions are directly compared by medium-energy ion scattering. The c(2×8) surface is shown to induce considerably less atomic displacements than the (7×7) structure. The data are in good agreement with a simple adatom model for the c(2×8) reconstructed surface.