PHZ3400 Phonons: Difference between revisions
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<math>C_{v} = \frac{\partial \epsilon (T)}{\partial T} = 3nk_{B}</math> | <math>C_{v} = \frac{\partial \epsilon (T)}{\partial T} = 3nk_{B}</math> | ||
- | -Works fine at high temperature, but at low temperature the quantum mechanical nature of the material dominates. The Debye model gives the correct interpretation at low temperature. | ||
==Quantization of sound waves: phonons== | ==Quantization of sound waves: phonons== | ||
Revision as of 09:15, 20 March 2009
Law of Dulong and Pettit: failure of classical physics
-Works fine at high temperature, but at low temperature the quantum mechanical nature of the material dominates. The Debye model gives the correct interpretation at low temperature.