Back نموذج الإلكترون شبه الحر Arabic Modell der quasifreien Elektronen German مدل الکترونی تقریبا آزاد Persian Modèle de l'électron quasi libre French מודל אלקטרונים כמעט חופשיים HE Modello degli elettroni quasi liberi Italian ほとんど自由な電子 Japanese 준자유 전자 모형 Korean Model elektronów prawie swobodnych Polish Приближение почти свободных электронов Russian
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In solid-state physics, the nearly free electron model (or NFE model and quasi-free electron model) is a quantum mechanical model of physical properties of electrons that can move almost freely through the crystal lattice of a solid. The model is closely related to the more conceptual empty lattice approximation. The model enables understanding and calculation of the electronic band structures, especially of metals.
This model is an immediate improvement of the free electron model, in which the metal was considered as a non-interacting electron gas and the ions were neglected completely.