RELATIVISTIC EFFECTS ON IMPURITY STATES

In this article, we have investigated the relativistic impacts on impu rity states. Our treatment is concerned with a model consisting of a ( rectangular) barrioer or well type potential embedded substitutionally in an infinite crystal with rectangular barrier type potentials. Our method is based on relativistic generalisation of an approach due to S axon and Hutner. Our study shows that there are many realistic circums tances under which the relativistic impacts on impurity states can be quite significant.