Question: At low temperature, there is a differential between Debye and Einstein model for the heat capacity because At low temperature acoustic phonons are much more

At low temperature, there is a differential between Debye and Einstein

At low temperature, there is a differential between Debye and Einstein model for the heat capacity because At low temperature acoustic phonons are much more populated At low temperature both acoustic O and optical phonons are equally populated At low temperature optical phonons are much more populated

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