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

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

2005-06-06

arxiv.org/abs/cond-mat/0506143v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

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. Configurationinteraction theory provides precise quantitative interpretations that uncover large correlation effects that are comparable to exchange Coulomb interactions.

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