arXiv:cond-mat/0506143 Abstract

arXiv:cond-mat/0506143Abstract References Reviews Resources

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

Published 2005-06-06, updated 2005-09-07Version 2

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.

Comments: 4 pages, 4 figures

Categories: cond-mat.mes-hall, cond-mat.str-el

Keywords: few-electron quantum dots, report inelastic light scattering measurements, narrow spin excitation peak, uncover large correlation effects, intershell triplet-to-singlet monopole mode

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