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--- 2 [2016/03/24 12:03] – created janet
+++ 2 [2020/03/06 09:14] (current) – external edit 127.0.0.1
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 ====== Day 2 ======
-W 3/30	Sommerfield model
+Free electron gas
 Reading: A&M Ch2-3, Kittel Ch6
-Summary: Gas of free electrons trapped in a 3d potential. Fermi Energy. Orders of magnitude. Introduce periodic potential.
+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 [[http://www.slideshare.net/jongyeonglee1/solid-state-physics-04free-electrons-in-metals|free electron summary]].
+   * Simulations from Cornell University. [[http://pages.physics.cornell.edu/sss/drude/drude.html|Drude model]] shows motion of 8 electrons in crossed E and B fields. Other useful ones are [[http://pages.physics.cornell.edu/sss/bloch/bloch.html|Bloch]], [[http://pages.physics.cornell.edu/sss/peierls/peierls.html|Peierls]], [[http://pages.physics.cornell.edu/sss/ziman/ziman.html|Ziman]]