Abstract
We report Raman studies of the E 2 2 and A 1(LO) symmetry phonons of bulk A1N from 13 to 375 K. Based on observed dependences of the phonon energies and linewidths, and accounting for the temperature-dependent thermal expansion, we determine that both phonon lifetimes are limited by two-phonon decay. The E 2 2 decays symmetrically. The A 1(LO) asymmetrically decays into vibrations with energies 586 and 309 cm -1 which we attribute to A 1(TO) and LA phonons from the M point of the Brillouin zone.
Original language | English |
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Article number | 021901 |
Journal | Applied Physics Letters |
Volume | 89 |
Issue number | 2 |
DOIs | |
State | Published - 2006 |