Phonons contribute to the properties of both semiconductors and metals. The energy of a phonon is...

Phonons contribute to the properties of both semiconductors and metals. The energy of a phonon is
about 0.01 eV.
(a) Roughly at what temperature will the phonon energy equal thermal energy? Why is this temperature where the resistivity of a metal starts to increase with increasing temperature? How does the resistivity of a metal then depend on temperature?
(b) Why is the phonon needed for the photo-excited processes in indirect gap material?

Expert Solution

genius_generous answered 2 years ago

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