Abstract
AbstractA general expression is derived for the scattering‐dependent complex conductivity tensor σα β(ω, q). The density matrix satisfying the local charge and energy conservation laws in the presence of an electromagnetic field, is calculated in a linear approximation with respect to the carrier‐field interaction. It is shown that the conductivity tensor involves the term Δσαβ which vanishes if either the spatial dispersion or the scattering is not considered. In a high non‐uniform magnetic field at low frequencies the term gives rise to the conductivity current. If the orbital quantization is essential Δσαβ causes the diamagnetic susceptibility to become frequency‐dependent.
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