Exact Numerical Solution of the Binding Energy of Hydrogenic Impurity in Quantum Circle and Dot

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题名:	Exact Numerical Solution of the Binding Energy of Hydrogenic Impurity in Quantum Circle and Dot
作者:	謝正英
关键词:	Hydrogenic impurity;Quantum circle;Quantum dot
日期:	1999/10
上传时间:	2011-08-17T05:19:41Z
摘要:	Exact numerical solution of the lower lying state binding energies of hydrogenic impurity located at the center of a GaAs-A1xGa1-xAs quantum circle and quantum dot. The eigenfunctions of the impurity can be expressed in terms of Whittaker functions and Coulomb wave functions. The ground state and lower lying state binding energies are expressed in terms of the circle and dot radius. For the single layer quantum circle, the ground state binding energy approaches 4 Ry as the radius approaches infinite and zero, like a hydrogenic impurity in 2-D. For the single layer quantum dot, the ground state binding energy approaches 1 Ry as the radius approaches infinite and zero, like a hydrogenic impurity in 3-D. For the multi-layer case, the ground state binding energy approaches the same value as the single layer case as the radius approaches infinite, but it apporaches different value as the radius reduces to zero. Our results are in agreement with the prediction of He8.
關聯:	德育學報第十五期:116-139
显示于类别:	[德育學報(1-18期)] 德育學報15期

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