Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
1997-09-17
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
10 pages of ReVTex, 6 ps figures, submitted to Phys. Rev. B
Scientific paper
10.1103/PhysRevB.57.R4237
Electron, hole, and exciton states of multishell CdS/HgS/CdS quantum-dot quantum well nanocrystals are determined by use of a multiband theory that includes valence-band mixing, modeled with a 6-band Luttinger-Kohn Hamiltonian, and nonparabolicity of the conduction band. The multiband theory correctly describes the recently observed dark-exciton ground state and the lowest, optically active, bright-exciton states. Charge separation in pair states is identified. Previous single-band theories could not describe these states or account for charge separation.
Bryant Garnett W.
Jaskolski W.
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