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Donor Centers and Absorption Spectra in Quantum Dots | | Jaime Zaratiegui García
; Pekka Pietiläinen
; Petteri Hyvönen
; | | Date: |
20 Mar 2002 | | Subject: | Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall | | Abstract: | We have studied the electronic properties and optical absorption spectra of three different cases of donor centers, D^{0}, D^{-} and D^{2-}, which are subjected to a perpendicular magnetic field, using the exact diagonalization method. The energies of the lowest lying states are obtained as function of the applied magnetic field strength B and the distance zeta between the positive ion and the confinement xy-plane. Our calculations indicate that the positive ion induces transitions in the ground-state, which can be observed clearly in the absorption spectra, but as zeta goes to 0 the strength of the applied magnetic field needed for a transition to occur tends to infinity. | | Source: | arXiv, cond-mat/0203398 | | Services: | Forum | Review | PDF | Favorites | |
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