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Canonico M, Poweleit C, Menéndez J, et al. Anomalous LO phonon lifetime in AlAs. Phys Rev Lett. 2002;88(21):215502doi: 10.1103/PhysRevLett.88.215502.
Canonico, M., Poweleit, C., Menéndez, J., Debernardi, A., Johnson, S. R., & Zhang, Y. H. (2002). Anomalous LO phonon lifetime in AlAs. Physical review letters, 88(21), 215502. https://doi.org/10.1103/PhysRevLett.88.215502
Canonico, M, et al. "Anomalous LO phonon lifetime in AlAs." Physical review letters vol. 88,21 (2002): 215502. doi: https://doi.org/10.1103/PhysRevLett.88.215502
Canonico M, Poweleit C, Menéndez J, Debernardi A, Johnson SR, Zhang YH. Anomalous LO phonon lifetime in AlAs. Phys Rev Lett. 2002 May 27;88(21):215502. doi: 10.1103/PhysRevLett.88.215502. Epub 2002 May 14. PMID: 12059485.
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Phys Rev Lett. 2002 May 27;88(21):215502. doi: 10.1103/PhysRevLett.88.215502. Epub 2002 May 14.

Anomalous LO phonon lifetime in AlAs.

Physical review letters

M Canonico, C Poweleit, J Menéndez, A Debernardi, S R Johnson, Y-H Zhang

Affiliations

  1. Department of Physics and Astronomy, Arizona State University, Box 871504, Tempe, Arizona 85287-1504, USA.

PMID: 12059485 DOI: 10.1103/PhysRevLett.88.215502

Abstract

The temperature dependence of the frequencies and linewidths of the Raman-active longitudinal optical (LO) phonons in GaAs and AlAs have been measured. The low-temperature lifetime of the LO phonon in AlAs is found to be 9.7 ps, very close to the corresponding GaAs value of 9.5 ps. This contradicts early theoretical predictions. The agreement between theory and experiment can be restored when the accidental degeneracy between the AlAs LO phonon frequency and a feature in the two-phonon density of states is taken into account.

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