This page contains links to a few notes that are either giving background information on basic subjects not treated in detail in the book, or on more advanced subjects that are not treated either.
Phase velocity and group velocity
Heitler-London model for the hydrogen molecule
Elastic constants: relation between Young’s modulus, modulus of rigidity and Poisson’s ratio
Calculation of atomic diamagnetism in a semi-classical picture
Effective mass in graphene
Hall effect in Bismuth
Bloch oscillations
Local electric field inside a dielectric
Spin-polarized scanning tunnelling microscopy