We present recent studies of electronic excitations in nanofabricated AlGaAs/GaAs semiconductor quantum dots (QDs) by resonant inelastic light scattering. The resonant light scattering spectra are dominated by excitations from parity-allowed inter-shell transitions between Fock-Darwin levels. In QDs With very few electrons the resonant spectra are characterized by distinct charge and spin excitations that reveal the strong impact of both exchange and correlation effects. A sharp inter-shell spin excitation of the triplet spin QD state with four electrons is identified. (c) 2006 Elsevier B.V. All rights reserved.
Spin excitations in few-electrons AlGaAs/GaAs quantum dots probed by inelastic light scattering / C. P., Garcia; V., Pellegrini; A., Pinczuk; Rontani, Massimo; Goldoni, Guido; Molinari, Elisa; B. S., Dennis; L. N., Pfeiffer; K. W., West. - In: PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES. - ISSN 1386-9477. - STAMPA. - 34:1-2(2006), pp. 304-307. [10.1016/j.physe.2006.03.079]
Spin excitations in few-electrons AlGaAs/GaAs quantum dots probed by inelastic light scattering
RONTANI, Massimo;GOLDONI, Guido;MOLINARI, Elisa;
2006
Abstract
We present recent studies of electronic excitations in nanofabricated AlGaAs/GaAs semiconductor quantum dots (QDs) by resonant inelastic light scattering. The resonant light scattering spectra are dominated by excitations from parity-allowed inter-shell transitions between Fock-Darwin levels. In QDs With very few electrons the resonant spectra are characterized by distinct charge and spin excitations that reveal the strong impact of both exchange and correlation effects. A sharp inter-shell spin excitation of the triplet spin QD state with four electrons is identified. (c) 2006 Elsevier B.V. All rights reserved.
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