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The possibility of semiconductor-metal transition in a spherical quantum dot. (English) Zbl 1312.82024

Summary: We observe an abrupt change in diamagnetic susceptibility at critical donor concentration for an Al\(_{\text X}\)Ga\(_{1-\text X}\)As/GaAs quantum dot system in the effective mass approximation indicating a possible semiconductor metal transition. The effect of confining potential and the laser intensity on the abrupt change in diamagnetic susceptibility has also been studied. The effect of nonparabolicity of the conduction band has been included in our calculations. Results are presented and discussed.

MSC:

82D37 Statistical mechanics of semiconductors
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