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Electronic Structure of Mercury, Gold and Platinum Impurities in Silicon

Published online by Cambridge University Press:  28 February 2011

Jose R. Leite  and
Jose L.A. Alves
Jose R. Leite
Affiliation:
Instituto de Física da Universidade de São Paulo, Caixa Postal 20516, São Paulo, CEP 01498, São Paulo, Brazil
Jose L.A. Alves
Affiliation:
Instituto de Física da Universidade de São Paulo, Caixa Postal 20516, São Paulo, CEP 01498, São Paulo, Brazil
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Abstract

The electronic structures of substitutional and tetrahedral-site interstitial Hg+, Auo and Pt− isoelectronic impurities in silicon have been analysed. The centers are theoretically described by the Watson-sphereterminated molecular cluster model within the framework of the multiplescattering Xa formalism. At the substitutional sites the centers are related to the “vacancy” model recently proposed to describe the properties of the elements at the end of the transition-metal series. At the interstitialsites the impurities introduce a hyperdeep s-like level close to the bottom of the valence band and, in agreement with experiments, do not show shallow donor activities. For all the analysed centers the d-states remain fully occupied below, or within, the valence band.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 46: Symposium B – Microscopic Identification of Electronic Defects in Semiconductors , 1985 , 143
Copyright
Copyright © Materials Research Society 1985

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