University of Oxford Physics Year 3 - Condensed Matter Physics (B6) Complete Lecture Notes & Revision Guide

Comprehensive handwritten lecture notes for the University of Oxford Year 3 Physics course "Condensed Matter Physics (B6)". These notes provide a structured and detailed treatment of the material covered throughout the course, including derivations, worked examples, key formulas, diagrams, and explanations designed to support both understanding and revision. Topics covered include: • Structure of condensed matter, condensed phases, many-body systems, collective behaviour, and the physical origins of material properties • Chemical bonding in solids including ionic, covalent, metallic, hydrogen-bonded, and van der Waals systems, together with their role in determining material structure and behaviour • Crystal structures, Bravais lattices, unit cells, lattice vectors, reciprocal lattices, crystal symmetries, and Brillouin zones • X-ray and neutron diffraction, Bragg and Laue conditions, structure factors, atomic form factors, scattering lengths, and experimental determination of crystal structures • Vibrations in solids, lattice dynamics, monatomic and diatomic chains, normal modes, acoustic and optical phonons, phonon quantisation, and crystal momentum • Heat capacity of solids, Dulong-Petit law, Einstein model, Debye model, phonon density of states, and low-temperature behaviour of crystalline materials • Free-electron theory of metals, Drude theory, Sommerfeld theory, Fermi energy, Fermi surfaces, density of states, electrical conductivity, Hall effect, thermal conductivity, and thermoelectric effects • Electronic band structure, nearly-free-electron approximation, tight-binding theory, dispersion relations, effective mass, band gaps, and electronic states in periodic potentials • Distinction between metals, semiconductors, and insulators through band theory and electronic occupation of states • Semiconductor physics including direct and indirect band gaps, optical absorption, donor and acceptor doping, carrier concentration, mobility, Hall measurements, and temperature dependence of transport properties • Magnetic properties of matter including diamagnetism, paramagnetism, Pauli paramagnetism, Hund's rules, exchange interactions, ferromagnetism, Curie-Weiss behaviour, magnetic domains, and collective magnetic phenomena • Applications of condensed matter physics to modern materials, electronic devices, quantum materials, and the microscopic foundations of solid-state phenomena The document consists of carefully organised handwritten notes taken during the course and is suitable for lecture review, tutorial preparation, revision, and exam preparation. Ideal for Oxford Physics students and anyone studying condensed matter physics, solid-state physics, materials science, and the quantum theory of solids.