Condensed Matter Physics
The physics of matter in its densely packed, everyday forms — the crystalline order of solids, the collective behaviour of electrons that makes some materials conduct and others insulate, magnetism, and the strange low-temperature quantum phases like superconductivity and superfluidity that emerge when countless particles cooperate.
Condensed matter physics is the branch of physics studying the physical properties of matter in condensed phases — chiefly solids and liquids — where large numbers of particles interact strongly enough to produce collective behaviour fundamentally different from that of the isolated particles, from the electrical conductivity of metals to the frictionless flow of a superfluid.
What this domain covers
Condensed matter physics is, by most measures, the largest single subfield of physics today, spanning everything from the crystal structures that determine a material's basic geometry, to the quantum mechanical band theory explaining why some materials conduct electricity and others don't, to genuinely exotic macroscopic quantum phenomena like superconductivity and Bose-Einstein condensation, where quantum effects normally confined to the atomic scale become directly visible at the scale of an entire material sample.
Crystal Structure
- Crystal Structure [DONE — Session 14 — 2026-08-01] · simulation
- Bravais Lattices [DONE — Session 15 — 2026-08-05]
- Reciprocal Lattice [PENDING FULL ENTRY]
- Miller Indices [PENDING FULL ENTRY]
- X-Ray Diffraction [PENDING FULL ENTRY]
- Bragg's Law [PENDING FULL ENTRY — equation already covered on Crystal Structure and the simulation]
Electronic Structure
- Band Theory [DONE — Session 14 — 2026-08-01]
- Energy Bands [DONE — Session 23 — 2026-10-12]
- Brillouin Zone [DONE — Session 23 — 2026-10-12]
- Bloch's Theorem [DONE — Session 15 — 2026-08-05]
- Effective Mass [DONE — Session 23 — 2026-10-12]
- Fermi Energy [DONE — Session 15 — 2026-08-05]
- Density of States [DONE — Session 23 — 2026-10-12]
Materials
- Metals [DONE — Session 16 — 2026-08-05]
- Insulators [DONE — Session 23 — 2026-10-12]
- Semiconductors [DONE — Session 14 — 2026-08-01]
- P-N Junction [DONE — Session 23 — 2026-10-12]
- Dielectrics [PENDING FULL ENTRY]
- Ferroelectrics [PENDING FULL ENTRY]
Magnetism
- Magnetism [DONE — Session 15 — 2026-08-05]
- Diamagnetism [PENDING FULL ENTRY]
- Paramagnetism [PENDING FULL ENTRY]
- Ferromagnetism [DONE — Session 16 — 2026-08-05]
- Antiferromagnetism [PENDING FULL ENTRY]
- Magnetic Domains [PENDING FULL ENTRY]
- Exchange Interaction [DONE — Session 16 — 2026-08-05]
Superconductivity & Quantum Phases
- Superconductivity [DONE — Session 14 — 2026-08-01]
- Meissner Effect [DONE — Session 16 — 2026-08-05]
- BCS Theory [DONE — Session 16 — 2026-08-05]
- Cooper Pairs [DONE — Session 15 — 2026-08-05]
- Type I and Type II Superconductors [PENDING FULL ENTRY]
- Quantum Hall Effect [PENDING FULL ENTRY]
- Fractional Quantum Hall Effect [PENDING FULL ENTRY]
- Topological Insulators [PENDING FULL ENTRY]
- Bose-Einstein Condensation [DONE — Session 14 — 2026-08-01]
- Superfluidity [PENDING FULL ENTRY]
Soft Matter
- Liquid Crystals [PENDING FULL ENTRY]
- Polymers [PENDING FULL ENTRY]
- Colloids [PENDING FULL ENTRY]
Sources
- Kittel, C. (2004). Introduction to Solid State Physics, 8th ed. Wiley.
- Ashcroft, N.W., Mermin, N.D. (1976). Solid State Physics. Holt, Rinehart and Winston.