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  2. Free electron model - Wikipedia

    en.wikipedia.org/wiki/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, [1] 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.

  3. Electronic band structure - Wikipedia

    en.wikipedia.org/wiki/Electronic_band_structure

    [1]: 161 The first one is the nearly free electron model, in which the electrons are assumed to move almost freely within the material. In this model, the electronic states resemble free electron plane waves, and are only slightly perturbed by the crystal lattice. This model explains the origin of the electronic dispersion relation, but the ...

  4. Particle in a one-dimensional lattice - Wikipedia

    en.wikipedia.org/wiki/Particle_in_a_one...

    In quantum mechanics, the particle in a one-dimensional lattice is a problem that occurs in the model of a periodic crystal lattice.The potential is caused by ions in the periodic structure of the crystal creating an electromagnetic field so electrons are subject to a regular potential inside the lattice.

  5. Free electron - Wikipedia

    en.wikipedia.org/wiki/Free_electron

    Free electron in physics may refer to: Electron, as a free particle; Solvated electron; Charge carrier, as carriers of electric charge; Valence electron, as an outer shell electron that is associated with an atom; Valence and conduction bands, as a conduction band electron relative to the electronic band structure of a solid

  6. Nearly free electron model - Wikipedia

    en.wikipedia.org/wiki/Nearly_free_electron_model

    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.

  7. Wiedemann–Franz law - Wikipedia

    en.wikipedia.org/wiki/Wiedemann–Franz_law

    Free electron model [ edit ] After taking into account the quantum effects, as in the free electron model , the heat capacity, mean free path and average speed of electrons are modified and the proportionality constant is then corrected to π 2 3 ≈ 3.29 {\displaystyle {\frac {\pi ^{2}}{3}}\approx 3.29} , which agrees with experimental values.

  8. Plasmon - Wikipedia

    en.wikipedia.org/wiki/Plasmon

    In physics, a plasmon is a quantum of plasma oscillation. ... The plasmon energy can often be estimated in the free electron model as = =, where is the ...

  9. Independent electron approximation - Wikipedia

    en.wikipedia.org/wiki/Independent_electron...

    In condensed matter physics, the independent electron approximation is a simplification used in complex systems, consisting of many electrons, that approximates the electronelectron interaction in crystals as null. It is a requirement for both the free electron model and the nearly-free electron model, where it is used alongside Bloch's ...