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 r_{C} is surrounded by concentric spherical layers each of Hg_{1-x}Cd_{x}S composition (x is function of r) and finally, form radius r_{S} 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 |