**Solid state physics** is a branch of condensed matter physics. It deals with the study of solids, i.e. rigid matter including crystals (ordered solids) and glasses (disordered solids).

### Topics

- bandgap
- Bloch waves (electron waves in lattice)
- conduction band
- crystal lattice
- effective mass
- electrical conduction
- electron hole
- electron gas
- phonons (lattice vibrations)
- valence band

### External links and references

- Online textbook:
*Introduction to Modern Solid State Physics*by Yuri M. Galperin.