Density-functional theory study of Au, Ag and Cu defects in germanium

• Presented at: International Symposium on Beyond Silicon Technology held at the 2008 EMRS Spring Meeting, Strasbourg, FRANCE, May 26-30, 2008
• Published in: Materials Science In Semiconductor Processing, vol. 11, p. 340-343
• Publication date: 2008

Gold, silver and copper defects in germanium are modeled using density functional theory. The structures and electrical properties of the substitutional metals are calculated in excellent agreement with experiment. Interstitial Au, Ag and Cu are found to be shallow donors, in disagreement with a previous assignment of Cui to a hole trap in the lower half of the gap. Substitutional-interstitial metal (M-i-M-s) pairs and metal-vacancy pairs (MS-V) are also investigated. (C) 2008 Elsevier Ltd. All rights reserved.

Keywords: Germanium ; Defects ; Metals ; Copper ; Silver ; Gold ; Electrical levels ; Diffusion ; Copper ; Diffusion ; Silicon ; Solubility

Reference

• EPFL-CONF-178080
• doi:10.1016/j.mssp.2008.10.007
• View record in Web of Science

Record created on 2012-06-12, modified on 2017-05-10