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Back Cover: Au–Ge bonding on a uniformly Au‐covered Ge(001) surface (Phys. Status Solidi RRL 4/2013)
Author(s) -
Popescu Dana G.,
Husanu Marius A.
Publication year - 2013
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201390012
Subject(s) - x ray photoelectron spectroscopy , valence (chemistry) , scanning tunneling microscope , dimer , crystallography , materials science , covalent bond , germanium , cover (algebra) , metal , surface (topology) , context (archaeology) , nanotechnology , chemistry , physics , silicon , nuclear magnetic resonance , optoelectronics , geometry , metallurgy , geography , mechanical engineering , organic chemistry , engineering , mathematics , archaeology
The Rapid Research Letter by Dana G. Popescu and Marius A. Husanu ( pp. 274–277 ) reveals the mechanisms acting at the Au/Ge interface, when one single atomic layer (1 ML) of Au is deposited on heated Ge surface. Understanding the nature of the interactions between the ad‐atoms and the substrate plays an important role in the context of newly established dimerized surfaces (Si, Ge) as efficient host for the growth of noble metals chains (Pt, Au, Ag). Employing first principles calculations and correlating photoelectron spectroscopy, in both valence and core level regions, with scanning tunneling microscopy, the authors establish that a uniform coverage regime may occur. The surface is featured by symmetric surface dimers, covalently bonded with Au atoms. The metallic character of the surface is due to the Au5d–Ge3s3p hybridized states. The XPS signature of Ge‐dimer‐bonded Au is documented for the first time in the Au 4f core‐level spectra.