Solid-State Physics
Solid-state physics looks at how atoms, molecules, and electrons are arranged inside a solid material — and how that arrangement determines the material's large-scale properties, such as conductivity, hardness, or magnetic behavior.
Crystal structures
Many solids are crystalline: their building blocks repeat in a regular, symmetric pattern. The specific symmetry of a crystal lattice directly shapes the material's mechanical and electrical properties.
Electronic properties
A central theme is how electrons move within a solid — how they absorb or release energy, and what that means for a material's electrical, magnetic, and optical behavior.
Phase transitions & superconductivity
Under certain conditions — a change in temperature or pressure, for instance — materials shift from one state to another. A particularly striking case is superconductivity: some materials lose all electrical resistance entirely at very low temperatures.
Semiconductor physics
The study of semiconductor materials is one of the most practically significant branches of solid-state physics, since it provides the physical foundation for transistors and microprocessors.