Abstract
We consider the effective potential of an impurity charge placed into a two dimensional non-interacting electron gas at zero temperature and in the presence of a perpendicular, quantum limit magnetic field. Restricting ourselves to a one band model and describing the electronic self-energy due to the impurity scattering in the generalized Born approximation (GBA), it is possible to derive a selfconsistency equation for the RPA-dielectric function.
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