An Exciton Bound to a Neutral Donor in Quantum Dots

Chin. Phys. Lett.

2002, Vol. 19

Issue (5): 730-732 DOI:

Original Articles

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

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XIE Wen-Fang 2002 Chin. Phys. Lett. 19 730-732

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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.

Keywords: 73.20.Dx 71.35.Gg

Published: 01 May 2002

PACS:	73.20.Dx
	71.35.Gg	(Exciton-mediated interactions)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2002/V19/I5/0730

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