Debye Model - Low Temperature Limit

Low Temperature Limit

The temperature of a Debye solid is said to be low if, leading to

This definite integral can be evaluated exactly:

In the low temperature limit, the limitations of the Debye model mentioned above do not apply, and it gives a correct relationship between (phononic) heat capacity, temperature, the elastic coefficients, and the volume per atom (the latter quantities being contained in the Debye temperature).

Read more about this topic:  Debye Model

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