Abstract
The subband structure and the impurity binding energies for asymmetric quantum wells are calculated variationally. The well width, impurity position and the electric field dependence of the impurity binding energy are studied. The density of states associated with impurity and the electron probability distribution is also calculated. The results agree completely with previous calculations when certain limiting cases are considered. PACS NO: 73.20.DX; 77.30.+d.
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