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Capacitance of anisotropic quantum dots

✍ Scribed by A. Natori; M. Fujito; H. Yasunaga

Publisher: Elsevier Science
Year: 1997
Tongue: English
Weight: 180 KB
Volume: 22
Category: Article
ISSN: 0749-6036
DOI: 10.1006/spmi.1996.0261

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✦ Synopsis

The many-electron ground states in anisotropic parabolic quantum dots are investigated, by means of an unrestricted Hartree-Fock method. From the total energy, both the chemical potential and the differential capacitance of quantum dots are calculated. The effect of the shell structure due to quantization appears clearly in the chemical potential and the capacitance. The difference of the calculated differential capacitance from the classical one is caused by both the exchange interaction and the quantization. As the vertical extent of a dot increases from two-dimensional limit, the change of capacitance is small owing to cancellation between changes of Hartree term and exchange term, except at special number of electrons.

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