Vibrational Modes in Si_{x}Ge_{1-x} Alloys: Temperature and Compositional Dependence

Lorenc, M.; Humlíček, J.

Journal

Acta Physica Polonica A

1997 | 92 | 5 | 899-902

Article title

Vibrational Modes in Si_{x}Ge_{1-x} Alloys: Temperature and Compositional Dependence

Authors

M. Lorenc , J. Humlíček

Content

Full texts:

http://przyrbwn.icm.edu.pl/APP/PDF/92/a092z5p10.pdf [remote]

Title variants

Languages of publication

Abstracts

We report infrared absorption spectra of crystalline Si_{x}Ge_{1-x} alloys with silicon content 0 ≤ x ≤ 1 at room and liquid nitrogen temperature. We covered the spectral range from 375 to 1200 cm^{-1} that includes the "Si-Ge" and "Si-Si" single-phonon transitions, the continuum of two-phonon processes, and the localized mode of interstitial oxygen. We study the change of vibrational structure and correlation between reference (pure Si and Ge) and alloy spectra. We observed shifts to lower wave numbers by about 1 cm^{-1} of the two-phonon absorption bands per 1% increase in germanium concentration. Pronounced changes of the vibrational spectra upon lowering the temperature were detected.

Keywords

78.30.Am 63.20.Dj

Publisher

Journal

Acta Physica Polonica A

Year

1997

Volume

Issue

Pages

899-902

Physical description

Dates

published

1997-11

Contributors

author

M. Lorenc

Faculty of Science, Department of Solid State Physics, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic

author

J. Humlíček

Faculty of Science, Department of Solid State Physics, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic

References

Document Type

Publication order reference

Identifiers

YADDA identifier

bwmeta1.element.bwnjournal-article-appv92z510kz