Electron and Hole States in Closed Spherical Quantum Dot with Linearly Graded Composition
R. Kostić and D. Stojanović
Institute of Physics, Pregrevica 118, 11080 Belgrade, Serbia
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The theoretical investigation of the electron and hole spectra in a quantum dot with a linearly graded composition within the effective mass approximation is presented. The particular example is β-HgS surrounded by CdS. β-HgS core of radius rC is surrounded by concentric spherical layers each of Hg1-xCdxS composition (x is function of r) and finally, form radius rS by CdS. The existence of these intermediate layers, as model of graded composition, influences rapidly electron and hole spectra.
DOI: 10.12693/APhysPolA.115.768
PACS numbers: 73.22.Dj, 73.21.La