Vibrational dynamics of isolated hydrogen in germanium

N. H. Tolk, C. Parks Cheney, M. Budde, G. Lüpke, Leonard C Feldman

Research output: Contribution to journalArticle

Abstract

Absorption line shapes associated with the stretch mode of bond-center hydrogen (HBC (+)) at 1794 cm-1 and the twofold degenerate mode of hydrogen near the tetrahedral site (H(-)) at 745 cm-1 in germanium are measured with infrared-absorption spectroscopy. The HBC (+) line shape measured at 10 K for the case of low hydrogen concentrations gives a lifetime between 15 and 23 ps. Similar in magnitude to the 7.8±0.2 ps observed for the same defect in silicon [M. Budde et al, Phys. Rev. Lett. 85, 1452 (2000)], this observation indicates that the lifetime of the bond-centered mode is largely insensitive to the phonon frequency distributions of the host material. Pure dephasing dynamics of hydrogen in germanium are studied by measuring the shape of the 1794- and 745-cm-1 lines as a function of temperature. These measurements are analyzed using a recently formulated exchange model for vibrational dephasing. The temperature dependence of the 1794-cm-1 line shape is attributed to thermal fluctuations in the occupation number of a pseudolocalized mode at 75±2 cm-1.

Original languageEnglish
Article number035214
Pages (from-to)352141-352149
Number of pages9
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number3
Publication statusPublished - Jan 15 2002

Fingerprint

Germanium
Hydrogen
germanium
line shape
hydrogen
life (durability)
frequency distribution
Infrared absorption
Silicon
Absorption spectroscopy
occupation
infrared absorption
Infrared spectroscopy
absorption spectroscopy
infrared spectroscopy
Temperature
Defects
temperature dependence
defects
silicon

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Tolk, N. H., Parks Cheney, C., Budde, M., Lüpke, G., & Feldman, L. C. (2002). Vibrational dynamics of isolated hydrogen in germanium. Physical Review B - Condensed Matter and Materials Physics, 65(3), 352141-352149. [035214].

Vibrational dynamics of isolated hydrogen in germanium. / Tolk, N. H.; Parks Cheney, C.; Budde, M.; Lüpke, G.; Feldman, Leonard C.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 65, No. 3, 035214, 15.01.2002, p. 352141-352149.

Research output: Contribution to journalArticle

Tolk, NH, Parks Cheney, C, Budde, M, Lüpke, G & Feldman, LC 2002, 'Vibrational dynamics of isolated hydrogen in germanium', Physical Review B - Condensed Matter and Materials Physics, vol. 65, no. 3, 035214, pp. 352141-352149.
Tolk NH, Parks Cheney C, Budde M, Lüpke G, Feldman LC. Vibrational dynamics of isolated hydrogen in germanium. Physical Review B - Condensed Matter and Materials Physics. 2002 Jan 15;65(3):352141-352149. 035214.
Tolk, N. H. ; Parks Cheney, C. ; Budde, M. ; Lüpke, G. ; Feldman, Leonard C. / Vibrational dynamics of isolated hydrogen in germanium. In: Physical Review B - Condensed Matter and Materials Physics. 2002 ; Vol. 65, No. 3. pp. 352141-352149.
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