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Atomic nanowires on the Pt/Ge(001) surface: buried Pt-Ge versus top Pt-Pt chains
A A Stekolnikov1, F Bechstedt, M Wisniewski
1Institut für Festkörpertheorie and -Optik, Friedrich-Schiller-Universität and European Theoretical Spectroscopy Facility (ETSF), Jena, Germany.
Abstract:
Combining total-energy calculations, electronic-structure studies, and scanning tunneling microscopy (STM), we demonstrate that the observed one-dimensional nanowires are composed of Pt-induced Ge structures instead of Pt chains. Pt-Ge bonds are favored versus Pt-Pt ones. The novel tetramer-dimer-chain model explains STM features and the differential conductivity. The conduction path is related to the chain of alternating Pt-Ge atoms.
