Free electron model
A SIMPLE MODEL FOR THE BEHAVIOUR OF VALENCE ELECTRONS IN A CRYSTAL STRUCTURE OF A METALLIC SOLID
Free-Electron Model of Metals; Free-electron theory of metals; Drude-Sommerfeld model; Drude–Sommerfeld model; Free-electron theory; Free electron theory; Free-electron model
In solid-state physics, the free electron model is a quantum mechanical model for the behaviour of charge carriers in a metallic solid. It was developed in 1927, principally by Arnold Sommerfeld, who combined the classical Drude model with quantum mechanical Fermi–Dirac statistics and hence it is also known as the Drude–Sommerfeld model.