quasi-free-electron theory

quasi-free-electron theory

[¦kwä·zē ¦frē i′lek‚tran ‚thē·ə·rē]
(solid-state physics)
A modification of the free-electron theory of metals to take into account the periodic variation of the potential acting on a conduction electron, in which these electrons are assigned an effective scalar mass which differs from their real mass.
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