2
Day 2
Free electron gas
Reading: A&M Ch2-3, Kittel Ch6
Summary: Gas of N free electrons in a 3d potential - the Sommerfeld and Drude models. Wave functions, energy of multi-particle free electron gas. k-states, counting. Density of states in 3 dimensions. Fermi energy and other Fermi quantities. Orders of magnitude. Electrical conductivity in the Drude/Sommerfeld models.
Next time: Hall effect, specific heat, thermal conductivity and thermopower.
- Good free electron summary.
- Simulations from Cornell University. Drude model shows motion of 8 electrons in crossed E and B fields. Other useful ones are Bloch, Peierls, Ziman
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