%0 Journal Article
%T Structural Examination of Au/Ge(001) by Surface X-Ray Diffraction and Scanning Tunneling Microscopy
%A S. Meyer
%A T. Umbach
%A C. Blumenstein
%A J. Sch£¿fer
%A R. Claessen
%A S. Sauer
%A S. J. Leake
%A P. R. Willmott
%A M. Fiedler
%A F. Bechstedt
%J Physics
%D 2012
%I arXiv
%R 10.1103/PhysRevB.85.235439
%X The one-dimensional reconstruction of Au/Ge(001) was investigated by means of autocorrelation functions from surface x-ray diffraction (SXRD) and scanning tunneling microscopy (STM). Interatomic distances found in the SXRD-Patterson map are substantiated by results from STM. The Au coverage, recently determined to be 3/4 of a monolayer of gold, together with SXRD leads to three non-equivalent positions for Au within the c(8x2) unit cell. Combined with structural information from STM topography and line profiling, two building blocks are identified: Au-Ge hetero-dimers within the top wire architecture and Au homo-dimers within the trenches. The incorporation of both components is discussed using density functional theory and model based Patterson maps by substituting Germanium atoms of the reconstructed Ge(001) surface.
%U http://arxiv.org/abs/1205.0887v1