Imaging correlated wave functions of few-electron quantum dots: Theory and scanning tunneling spectroscopy experiments

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Autor/in:
Erscheinungsjahr:
2007
Medientyp:
Text
Schlagworte:
  • Quantum dots
  • Electrons
  • Magnetic fields
  • Insulators
  • Quantum Dots
  • Spin
  • Quantum dots
  • Electrons
  • Magnetic fields
  • Insulators
  • Quantum Dots
  • Spin
Beschreibung:
  • We show both theoretically and experimentally that scanning tunneling spectroscopy (STS) images of semiconductor quantum dots may display clear signatures of electron-electron correlation. We apply many-body tunneling theory to a realistic model, which fully takes into account correlation effects and dot anisotropy. Comparing measured STS images of freestanding InAs quantum dots with those calculated by the full configuration interaction method, we explain the wave-function sequence in terms of images of one- and two-electron states. The STS map corresponding to double charging is significantly distorted by electron correlation with respect to the noninteracting case. © 2007 American Institute of Physics.
Lizenz:
  • info:eu-repo/semantics/closedAccess
Quellsystem:
Forschungsinformationssystem der UHH
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Quelldatensatz
oai:www.edit.fis.uni-hamburg.de:publications/07832b1d-fb11-4176-9f90-ec18f0076a57