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Electric field and concentration effects on the binding energy of a non - hydrogenic donor impurity in a finite cylindrical quantum well wire

S. DALGIC1,* , B. OZKAPI1

Affiliation

  1. Deparment of Physics, Trakya University, Edirne-22030, Turkey

Abstract

The effects of the electric field and concentration on the non-hydrogenic binding energy of a shallow donor impurity in a finite cylindrical quantum well wire (CQWW) of GaAs/ AlxGa1-xAs was investigated. Within the effective mass approximation, we have calculated the non-hydrogenic binding energy of donor impurity by a variational method as a function of applied electric field, the wire radius, donor impurity positions and concentration of Al. We have investigated the concentration effect of Al on the non-hydrogenic binding energy as a function of electric field, wire radius and impurity position in QWW. It is shown that the difference in donor binding energy in the hydrogenic and non-hydrogenic regimes varies with radius of QWWs and impurity position while the interplay of the electric field is the same..

Keywords

Quantum well wire, donor impurity, electric field and concentration effects.

Submitted at: July 5, 2009
Accepted at: Dec. 10, 2009

Citation

S. DALGIC, B. OZKAPI, Electric field and concentration effects on the binding energy of a non - hydrogenic donor impurity in a finite cylindrical quantum well wire, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 12, pp. 2120-2125 (2009)