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Vibrational Spectroscopy Of Gold Hydrogen Complexes In Silicon

Published online by Cambridge University Press:  15 February 2011

M. J. Evans
Affiliation:
Department of Physics, Lehigh University, Bethlehem, Pennsylvania 18015
M. G. Gornstein
Affiliation:
Department of Physics, Lehigh University, Bethlehem, Pennsylvania 18015
Michael Stavola
Affiliation:
Department of Physics, Lehigh University, Bethlehem, Pennsylvania 18015
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Abstract

Several vibrational bands have been observed in the region 1750–1900 cm−1 for n-type silicon into which gold and hydrogen had been introduced by high temperature diffusion. This paper focuses primarily on a defect which gives rise to bands at 1813.3 and 1827.1 cm−1. This center contains a single hydrogen atom and has two charge states in the gap with trigonal symmetry. We propose a tentative model in which this complex contains a substitutional Au atom and a single hydrogen atom at one of two possible antibonding sites, bonded either to Au or to Si. A defect observed previously in Si samples doped with Pt and H which gives rise to hydrogen stretching bands at 1880.7 and 1897.2 cm−1 has similar properties to the Au-H complex discussed here, suggesting that these defects have the same structure. Other hydrogenstretching modes observed in Si samples that contain Au and H are also discussed.

Type
Research Article
Copyright
Copyright © Materials Research Society 1997

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