Deinzer, Gernot and Schmitt, M. and Mayer, A. P. and Strauch, Dieter (2004) Intrinsic lifetimes and anharmonic frequency shifts of long-wavelength optical phonons in polar crystals. PHYSICAL REVIEW B, 69 (1): 014304. ISSN 1098-0121, 1550-235X
Full text not available from this repository.Abstract
Quantitative calculations of phonon lifetimes due to anharmonic three-phonon processes require knowledge of cubic anharmonic coupling coefficients. In order to determine the temperature dependence of phonon frequencies, anharmonic force constants of up to fourth order are needed. In polar crystals, the macroscopic electric field gives rise to nonanalytic terms in these coefficients. It is shown how these non-analytic terms can be determined from other physical quantities including higher-order dipole moments, Raman coefficients, and nonlinear susceptibilities. The contribution of these terms to the intrinsic damping of the long-wavelength optical phonon modes in GaAs has been determined by an ab initio calculation.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FUNCTIONAL PERTURBATION-THEORY; 2ND-ORDER RAMAN-SPECTRA; ABINITIO CALCULATION; QUANTUM WELLS; MONTE-CARLO; SEMICONDUCTORS; LINEWIDTH; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Alumni or Retired Professors > Group Dieter Strauch |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 27 Jul 2021 08:23 |
| Last Modified: | 27 Jul 2021 08:23 |
| URI: | https://pred.uni-regensburg.de/id/eprint/38248 |
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