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

Cesar Pascual Garcia; 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

Mesoscale and Nanoscale Physics 2015-06-25 v2 Strongly Correlated Electrons

Authors: Cesar Pascual Garcia , Vittorio Pellegrini , Aron Pinczuk , Massimo Rontani , Guido Goldoni , Elisa Molinari , Brian S. Dennis , Loren N. Pfeiffer , Ken W. West

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

Keywords

quantum dots spin excitations correlation effects configuration interaction few-electron systems

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@article{arxiv.cond-mat/0506143,
  title  = {Evidence of correlation in spin excitations of few-electron quantum dots},
  author = {Cesar Pascual Garcia and Vittorio Pellegrini and Aron Pinczuk and Massimo Rontani and Guido Goldoni and Elisa Molinari and Brian S. Dennis and Loren N. Pfeiffer and Ken W. West},
  journal= {arXiv preprint arXiv:cond-mat/0506143},
  year   = {2015}
}

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4 pages, 4 figures

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

Abstract

Keywords

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