Exciton Binding Energy as a Function of Barrier Width in Coupled Quantum Well Structures

Chin. Phys. Lett.

1992, Vol. 9

Issue (2): 93-96 DOI:

Original Articles

Exciton Binding Energy as a Function of Barrier Width in Coupled Quantum Well Structures

SHI Junjie+;PAN Shaohua

Institute of Physics, Academia Sinica, Beijing 100080 +Permanent address: Department of Physics, Henan Normal University, Xinxiang 453002

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SHI Junjie+, PAN Shaohua 1992 Chin. Phys. Lett. 9 93-96

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Abstract Excitons in a coupled quantum well structure (CQWS), consisting of two wells separated by a thick barrier, and in the two boundaries, the potential being infinite, are studied. The binding energy is calculated as a function of the barrier width. It is shown that there is a maximum in the binding energy as a function of the barrier width for an asymmetric CQWS, where as the binding energy is a monotonically decreasing function of the barrier width for a symmetric CQWS. Moreover, the binding energy in an asymmetric CQWS is larger than that in a symmetric CQWS.

Keywords: 73.20.Dx

Published: 01 February 1992

PACS:

73.20.Dx

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y1992/V9/I2/093

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