An Exciton Bound to a Neutral Donor in Quantum Dots
XIE Wen-Fang
Department of Physics, Guangzhou University, Guangzhou 510405
Department of Physics, Shanxi University, Taiyuan 030006
An Exciton Bound to a Neutral Donor in Quantum Dots
XIE Wen-Fang
Department of Physics, Guangzhou University, Guangzhou 510405
Department of Physics, Shanxi University, Taiyuan 030006
关键词 :
73.20.Dx ,
71.35.Gg
Abstract : The binding energies for an exciton (X) trapped in a two-dimensional quantum dot by a neutral donor have been calculated by using the method of few-body physics for the heavy hole (σ = 0.196) and the light hole (σ =0.707). We find that the (D0 ,X) complex confined in a quantum dot has in general a larger binding energy than those in a two-dimensional quantum well and a three-dimensional bulk semiconductor, and the binding energy increases with decrease of the dot radius. At dot radius R → ∞, we compare our calculated result with the previous results.
Key words :
73.20.Dx
71.35.Gg
出版日期: 2002-05-01
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