Correlation effects in wave function mapping of molecular beam epitaxy grown quantum dots

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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 investigate correlation effects in the regime of a few electrons in uncapped InAs quantum dots by tunneling spectroscopy and wave function (WF) mapping at high tunneling currents where electron-electron interactions become relevant. Four clearly resolved states are found, whose approximate symmetries are roughly s and p, in order of increasing energy. Because the major axes of the p-like states coincide, the WF sequence is inconsistent with the imaging of independent-electron orbitals. The results are explained in terms of many-body tunneling theory, by comparing measured maps with those calculated by taking correlation effects into account. © 2007 American Chemical Society.
Lizenz:
  • info:eu-repo/semantics/closedAccess
Quellsystem:
Forschungsinformationssystem der UHH
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oai:www.edit.fis.uni-hamburg.de:publications/1ec741c5-1c2a-4610-859e-47ddc60c0185