Title: Transition Metal Impurities on the Bond-Centered Site in Germanium
Authors: Decoster, Stefan ×
Cottenier, Stefaan
de Vries, Bernard Lammert
Emmerich, H
Wahl, Ulrich
Correia, J. G
Vantomme, André #
Issue Date: Feb-2009
Publisher: American Physical Society
Series Title: Physical Review Letters vol:102 issue:6
Article number: 065502
Abstract: We report on the lattice location of ion implanted Fe, Cu, and Ag impurities in germanium from a combined approach of emission channeling experiments and ab initio total energy calculations. Following common expectation, a fraction of these transition metals (TMs) was found on the substitutional Ge position. Less expected is the observation of a second fraction on the sixfold coordinated bond-centered site. Ab initio calculated heats of formation suggest this is the result of the trapping of a vacancy by a substitutional TM impurity, spontaneously forming an impurity-vacancy complex in the split-vacancy configuration. We also present an approach to displace the TM impurities from the electrically active substitutional site to the bond-centered site.
ISSN: 0031-9007
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Nuclear and Radiation Physics Section
× corresponding author
# (joint) last author

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