Determine the value of the phonon quasimomentum corresponding to the frequency o = 0.40max. The average value of the speed of sound in the crystal is = 2000 m/s, the characteristic Debye temperature is 0 D = 150 K. The dispersion of sound waves in the crystal is neglected.

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3. Determine the value of the phonon quasimomentum corresponding to the frequency o =
0.40max. The average value of the speed of sound in the crystal is <u> = 2000 m/s, the
characteristic Debye temperature is 0 D = 150 K. The dispersion of sound waves in the crystal is
neglected.
Transcribed Image Text:3. Determine the value of the phonon quasimomentum corresponding to the frequency o = 0.40max. The average value of the speed of sound in the crystal is <u> = 2000 m/s, the characteristic Debye temperature is 0 D = 150 K. The dispersion of sound waves in the crystal is neglected.
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