Evidence of correlation in spin excitations of few-electron quantum dots

César Pascual García; Vittorio Pellegrini; Aron Pinczuk; Massimo Rontani; Guido Goldoni; Elisa Molinari; Brian S. Dennis; Loren N. Pfeiffer; Ken W. West

doi:10.1103/PhysRevLett.95.266806

Evidence of correlation in spin excitations of few-electron quantum dots

César Pascual García, Vittorio Pellegrini, Aron Pinczuk, Massimo Rontani, Guido Goldoni, Elisa Molinari, Brian S. Dennis, Loren N. Pfeiffer, Ken W. West

Research output: Contribution to journal › Article › peer-review

47 Scopus citations

Abstract

We report inelastic light scattering measurements of spin and charge excitations in nanofabricated AlGaAs/GaAs quantum dots with few electrons. A narrow spin excitation peak is observed and assigned to the intershell triplet-to-singlet monopole mode of dots with four electrons. Configuration-interaction theory provides precise quantitative interpretations that uncover large correlation effects that are comparable to exchange Coulomb interactions.

Original language	English (US)
Article number	266806
Journal	Physical review letters
Volume	95
Issue number	26
DOIs	https://doi.org/10.1103/PhysRevLett.95.266806
State	Published - Dec 31 2005
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.95.266806

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AU - García, César Pascual

AU - Pellegrini, Vittorio

AU - Pinczuk, Aron

AU - Rontani, Massimo

AU - Goldoni, Guido

AU - Molinari, Elisa

AU - Dennis, Brian S.

AU - Pfeiffer, Loren N.

AU - West, Ken W.

PY - 2005/12/31

Y1 - 2005/12/31

N2 - We report inelastic light scattering measurements of spin and charge excitations in nanofabricated AlGaAs/GaAs quantum dots with few electrons. A narrow spin excitation peak is observed and assigned to the intershell triplet-to-singlet monopole mode of dots with four electrons. Configuration-interaction theory provides precise quantitative interpretations that uncover large correlation effects that are comparable to exchange Coulomb interactions.

AB - We report inelastic light scattering measurements of spin and charge excitations in nanofabricated AlGaAs/GaAs quantum dots with few electrons. A narrow spin excitation peak is observed and assigned to the intershell triplet-to-singlet monopole mode of dots with four electrons. Configuration-interaction theory provides precise quantitative interpretations that uncover large correlation effects that are comparable to exchange Coulomb interactions.

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JO - Physical review letters

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Evidence of correlation in spin excitations of few-electron quantum dots

Abstract

All Science Journal Classification (ASJC) codes

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