Host isotope effect on the local vibration modes of VH2 and VOH2 defects in isotopically enriched28Si, 29Si and30Si single crystals

Takeru Ohya; Kohei M. Itoh; Rui N. Pereira; Brian Bech Nielsen

doi:10.1143/JJAP.44.7309

Host isotope effect on the local vibration modes of VH₂ and VOH₂ defects in isotopically enriched²⁸Si, ²⁹Si and³⁰Si single crystals

Takeru Ohya, Kohei M. Itoh, Rui N. Pereira, Brian Bech Nielsen

President

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Local vibrational modes of a vacancy with two hydrogen atoms (VH ₂) and of a vacancy with one oxygen and two-hydrogen atoms (VOH ₂) in silicon have been investigated using isotopically enriched ²⁸Si, ²⁹Si, and ³⁰Si single crystals. Infrared absorption spectroscopy revealed shifts in the Si-H stretch frequencies of the two defects when the mass of the silicon host atoms was changed. The observed stretch frequencies can for each defect be accounted for with a simple vibrational model based on two coupled Morse oscillators. The anharmonic contribution to the local vibrational mode frequencies of these two defects is evaluated.

Original language	English
Pages (from-to)	7309-7313
Number of pages	5
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	44
Issue number	10
DOIs	https://doi.org/10.1143/JJAP.44.7309
Publication status	Published - 2005 Oct 11

Keywords

Defect
Infrared spectroscopy
Isotope engineering
Local vibrational mode
Oxygen
Silicon

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

Access to Document

10.1143/JJAP.44.7309

Cite this

Host isotope effect on the local vibration modes of VH₂ and VOH₂ defects in isotopically enriched²⁸Si, ²⁹Si and³⁰Si single crystals. / Ohya, Takeru; Itoh, Kohei M.; Pereira, Rui N. et al.
In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 44, No. 10, 11.10.2005, p. 7309-7313.

Research output: Contribution to journal › Article › peer-review

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abstract = "Local vibrational modes of a vacancy with two hydrogen atoms (VH 2) and of a vacancy with one oxygen and two-hydrogen atoms (VOH 2) in silicon have been investigated using isotopically enriched 28Si, 29Si, and 30Si single crystals. Infrared absorption spectroscopy revealed shifts in the Si-H stretch frequencies of the two defects when the mass of the silicon host atoms was changed. The observed stretch frequencies can for each defect be accounted for with a simple vibrational model based on two coupled Morse oscillators. The anharmonic contribution to the local vibrational mode frequencies of these two defects is evaluated.",

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