brillouin function
71Mott insulator — Mott insulators are a class of materials that should conduct electricity under conventional band theories, but are insulators when measured (particularly at low temperatures). This effect is due to electron electron interactions which are not… …
72Research reactor — Science with Neutrons Foundations Neutron temperature Flux · Radiation  …
73Langevin — may refer to:People* Adélard Langevin (1855 1915), Canadian priest * Charles Langevin (1789 1869), Businessman * Chris Langevin (1959 ), Canadian ice hockey player * Dave Langevin (1954 ), American ice hockey player * Hector Louis Langevin (1826… …
74Fiber optic sensor — A fiber optic sensor is a sensor that uses optical fiber either as the sensing element ( intrinsic sensors ), or as a means of relaying signals from a remote sensor to the electronics that process the signals ( extrinsic sensors ). Fibers have… …
75Glass transition — The liquid glass transition (or glass transition for short) is the reversible transition in amorphous materials (or in amorphous regions within semicrystalline materials) from a hard and relatively brittle state into a molten or rubber like state …
76Direct and indirect band gaps — In semiconductor physics, the band gap of a semiconductor is always one of two types, a direct band gap or an indirect band gap. The band gap is called direct if the momentum of electrons and holes is the same in both the conduction band and the… …
77Équation de Mathieu — En physique mathématique, on appelle équation de Mathieu une équation mise en évidence par Émile Mathieu au XIXe siècle. Il s agit de l équation différentielle linéaire du second ordre ci contre : , où , donc périodique Son comportement est… …
