Abstract
After an introductory account of some dielectric peculiarities of a pure zero temperature electron gas in the presence of a strong external magnetic field a simple calculation of the screening of a charged impurity is presented which takes into account the collisional damping in a self-consistent way. Numerical results show that for typical semiconductors the anisotropy of the screening imposed by the magnetic field is strongly reduced by the collisional damping. The screening length, however, depends rather strongly on the field.
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