Free Electron

electron that is detached from the atom

In solid-state physics, the free electron model is a simple model for the behaviour of valence electrons in a crystal structure of a metallic solid. It was developed principally by Arnold Sommerfeld who combined the classical Drude model with quantum mechanical Fermi-Dirac statistics. Given its simplicity, it is surprisingly successful in explaining many experimental phenomena, especiallythe Wiedemann-Franz law which relates electrical conductivity and thermal conductivity;the temperature dependence of the heat capacity;the shape of the electronic density of states;the range of binding energy values;electrical conductivities.
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Noun
1. electron that is not attached to an atom or ion or molecule but is free to move under the influence of an electric field
(hypernym) electron, negatron

free electron
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