Spin excitations in few-electrons AlGaAs/GaAs quantum dots probed by inelastic light scattering |
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| Authors: | C sar Pascual Garcí a, Vittorio Pellegrini, Aron Pinczuk, Massimo Rontani, Guido Goldoni, Elisa Molinari, Brian S. Dennis, Loren N. Pfeiffer,Ken W. West |
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| Affiliation: | aNEST-INFM and Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126 Pisa, Italy;bBell Labs, Lucent Technologies, Murray Hill, New Jersey, USA;cDepartment of Physics, Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, USA;dS3-INFM and Dipartimento di Fisica, Università degli Studi di Modena and Reggio Emilia, 41100 Modena, Italy |
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| 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. |
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| Keywords: | EP2DS-16 Correlation Quantum dots Nanosystems |
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