A Theoretical Study of the Heavy and Light Hole Properties of Cd1-xZnxS Quantum Dot Superlattices
International Journal of Materials Science and Applications
Volume 3, Issue 5, September 2014, Pages: 274-278
Received: Aug. 27, 2014; Accepted: Sep. 11, 2014; Published: Sep. 30, 2014
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Authors
Saber Marzougui, Unité de Physique Quantique, Faculté des Sciences, Université de Monastir, Monastir, Tunisia
Nabil Safta, Unité de Physique Quantique, Faculté des Sciences, Université de Monastir, Monastir, Tunisia
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Abstract
This work reports on a theoretical investigation of superlattices based on Cd1-xZnxS quantum dots embedded in an insulating material. This system, considered as a series of flattened cylindrical quantum dots with a finite barrier at the boundary, is studied using the tight binding approximation. The ground miniband width and the longitudinal effective mass, in the case of the heavy and light holes, have been computed as a function of zinc composition for different inter-quantum dot separations. An analysis of the results shows that the Zn composition x = 0.8 are appropriate to give rise a superlattice behavior for the light holes. As for the heavy holes, it has been showed the strong localization character of theses carriers in the Cd1-xZnxS nanostructures.
Keywords
Quantum Dots, Superlattices, Cd1-xZnxS, Heavy and Light Holes, Tight Binding Approximation, Specific Devices
To cite this article
Saber Marzougui, Nabil Safta, A Theoretical Study of the Heavy and Light Hole Properties of Cd1-xZnxS Quantum Dot Superlattices, International Journal of Materials Science and Applications. Vol. 3, No. 5, 2014, pp. 274-278. doi: 10.11648/j.ijmsa.20140305.30
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