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JimJim
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I am doing a basic introduction to solid state physics and I have come across a question which asks What the difference between two phonon interactions and three phonon intereactions.
I know that Normal colission and Umklapp colissions are part of the three phono interactions since it tells me this in Kittel's Introduction to solid state.
K1 + K2 = K3 (normal)
K1 + K2 = K3 + G (Umklapp)
So what would a 2 phonon interaction be?
At first I thought the two phonon interaction would be the intereaction between a phonon and its surroundings resulting in a new phonon of different momentum but the more reading I did left me rather confused.
Thanks :)
I know that Normal colission and Umklapp colissions are part of the three phono interactions since it tells me this in Kittel's Introduction to solid state.
K1 + K2 = K3 (normal)
K1 + K2 = K3 + G (Umklapp)
So what would a 2 phonon interaction be?
At first I thought the two phonon interaction would be the intereaction between a phonon and its surroundings resulting in a new phonon of different momentum but the more reading I did left me rather confused.
Thanks :)
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