ELECTRON I: Free electron model
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چکیده
Free electron model, constructed by Drude and Lorentz near 1900 (well before quantum mechanics was developed), can qualitatively explain the DC electrical conductivity, AC electrical conductivity, Hall effect, and magnetoresistance. Later inclusion of Fermi-Dirac distribution (as opposed to Boltzmann distribution) helps to explain the thermal conductivity and specific heat of electrons. However, many properties still need a full quantum mechanical explanation. For example, the existence of a ‘bandgap’ for semiconductors.
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Self-Fields Effects on Gain in a Helical Wiggler Free Electron Laser with Ion-Channel Guiding and Axial Magnetic Field
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