Coulomb-interaction-induced crossover from confined to bulk quantum-dot states in a magnetic field

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Erscheinungsjahr:
2000
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Text
Beschreibung:
  • We have employed inelastic light scattering to investigate electronic excitations of quantum dots in a magnetic field. For small magnetic fields the dispersion of the single-particle excitations (SPEs) follows the Fock–Darwin behavior. But already at moderate fields of B⩾0.6 T the SPEs deviate from that dispersion and follow directly the cyclotron resonance. This finding is explained by Coulomb-interaction-induced formation of bulk states in the center of the dot. Self-consistent ground-state calculations within the local-density approximation reproduce this result.
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  • info:eu-repo/semantics/closedAccess
Quellsystem:
Forschungsinformationssystem der UHH

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oai:www.edit.fis.uni-hamburg.de:publications/d4c97efa-bafa-4cd0-8103-e4e95dc4eb8e