In 2025/26, I am teaching the 4th year course Quantum Theory of Matter. My part of the course is a self-contained introduction to the microscopic BCS theory of superconductivity.
Here are the lecture notes:
Introduction to the microscopic theory of superconductors
Here are some further graduate-level lecture notes on topology + condensed matter:
Introduction to some of the simplest topological phases of matter
Dirac Equation Perspective on Higher-Order Topological Insulators