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Keywords:

  • photoelectron spectroscopy;
  • scanning tunnelling microscopy;
  • first-principles calculations

Abstract

Thumbnail image of graphical abstract

The structure and electronic properties of the system resulted by epitaxial growth of a single atomic Au layer on a heated Ge(001) surface featured by (2 × 1) reconstruction are studied. The deposition at ∼750 K results in a well-ordered Au surface featured by ripples separated by four times the theoretical distance between two neighboring Au atoms. As revealed by valence-band photoemission studies, the Au/Ge(001) system has metallic character. Correlating X-ray photoelectron spectroscopy results with first-principles calculations we derive the implications on the covalent bonding of Au on the Ge dimer surface.

(© 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)