I am aware that phonons are lattice vibrations - and that the amplitude of vibration would depend on the temperature. But say, at room temperature what would the order of magnitude of these lattice vibrations be ?(adsbygoogle = window.adsbygoogle || []).push({});

In particular, in continuum limit these phonons can be treated as elastic waves. So if I have take an incident planar longitudinal elastic wave at a surface, what would I need to take the amplitude of this wave to be ?

I do think that if I equate the energy stored in this wave integrated over all incident angles and frequencies to the heat capacity of the solid - I should be able to find the amplitude of this wave. Is this correct ?

Thanks!

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# What is an approximate amplitude of a phonon?

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