PDF lecture notes for an informal seminar series on metals and superconductors. Files are typically 10-20 pages long, and between 1 and 2 megabytes, with a few somewhat larger files.
Part I: The Drude Theory of metals
Lecture 1: Introduction to the Drude theory of metals
Lecture 2: Applications of the Drude theory
Lecture 3: AC electrical conductivity of a metal
Lecture 4: Thermal conductivity of a metal
Part II: The Sommerfeld theory of metals
Lecture 5: Ground state properties of a free electron gas
Lecture 6: The Fermi-Dirac distribution
Lecture 7: Energy density and specific heat in a free electron gas
Lecture 8: The Sommerfeld model of metals
Part III: Superconductivity
Lecture 9: Superconductivity: basic facts