FIZIKA A 10 (2001) 1 , 13-20

DONOR BINDING ENERGY IN A PARABOLIC QUANTUM WELL

N. EL-MESHAD^a, H. M. HASSANIEN^a and H. H. HASSAN^b

^aDepartment of Theoretical Physics, National Research Center, Cairo, Egypt
^bDepartment of Physics, Benha Institute of Technology, Benha, Egypt

Received 10 December 1999; revised manuscript received 30 June 2000
Accepted 11 December 2000

We solved the impurity problem in a parabolic quantum well. The binding energy of a neutral donor in GaAs-Alx Ga1!xAs parabolic quantum well is determined variationally. For a dopant at the well center, and at the edge of the well in the interface region, the changes in the binding energy of donors are calculated, for different well sizes and depths. The 2s excited state is reported.

PACS numbers: 68.65.+g UDC 538.971 

Keywords: parabolic quantum well, GaAs-Alx Ga1!xAs, neutral donor, 2s excited state

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