Hydrogen behaviour in bulk Si1-xGex alloys as modelled by muonium

P. J.C. King, R. L. Lichti, I. Yonenaga

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)

Abstract

Si1-xGex alloys have been the subject of much attention over the past decade due to their ability to provide new electrical properties and functionality whilst using existing silicon device fabrication technology. Here we are concerned with the behaviour of isolated hydrogen in bulk alloy material, as modelled by its pseudo-isotope muonium. In particular, hyperfine parameters of muonium species are determined; for the bond-centred state, a broad distribution of hyperfine constant is found, consistent with a variety of different bonding environments within the alloy, but with the average value showing a linear variation with alloy composition. The ionisation behaviour of the bond-centred species is also modified in low-Ge material compared with that seen in Si. The tetrahedral muonium species shows a lower than expected hyperfine parameter in low-Ge alloy material. Comparison with the known behaviour of hydrogen in Si and Ge when isovalent impurities are present is also made.

Original languageEnglish
Pages (from-to)835-839
Number of pages5
JournalPhysica B: Condensed Matter
Volume340-342
DOIs
Publication statusPublished - 2003 Dec 31
EventProceedings of the 22nd International Conference on Defects in (ICDS-22) - Aarhus, Denmark
Duration: 2003 Jul 282003 Aug 1

Keywords

  • Hydrogen impurity
  • Muonium
  • SiGe alloy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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