Abstract
The study is focused on a theoretical treatment of electrons in quantum dots produced by a nonuniform electric field in a heterostructure with a single quantum well. A nonuniform electric field can be formed with the use of a mosaic electrode with a regular system of nanometer-sized apertures. A structure involving a one-aperture electrode deposited onto the surface is considered. The potential in the entire region between the electrode plates is calculated numerically. The analytical expression for the depth of the potential well is derived, and the potential profile in the vicinity of the bottom of the well is determined. The energy level structure in the vicinity of the bottom of the potential well is calculated. The geometric characteristics of the mosaic electrode most favorable for conservation of electron spin in the quantum dots of this type are determined. It is shown that in the quantum dots of this type the spin lifetime can be expected to lie within the microsecond region at a liquid-helium temperature.
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Original Russian Text © V.A. Nikolyuk, I.V. Ignatiev, 2007, published in Fizika i Tekhnika Poluprovodnikov, 2007, Vol. 41, No. 12, pp. 1443–1450.
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Nikolyuk, V.A., Ignatiev, I.V. The energy structure of quantum dots induced in quantum wells by a nonuniform electric field. Semiconductors 41, 1422–1429 (2007). https://doi.org/10.1134/S1063782607120081
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DOI: https://doi.org/10.1134/S1063782607120081