Evaluate the simplified integral and introduce the
Debye frequency $\omega_{\text{D}}=k_{\text{D}}c$
and the Debye temperature $\Theta_{\text{D}}$ which is given by
- $\Theta_{\text{D}}=\hbar\omega_{\text{D}}$.
+ $k_{\text{B}}\Theta_{\text{D}}=\hbar\omega_{\text{D}}$.
Write down the resulting expression for the specific heat.
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