Many-body excitations in the tunneling current spectra of a few-electron quantum dot

D. V. Melnikov, T. Fujisawa, D. G. Austing, S. Tarucha, J. P. Leburton

Research output: Contribution to journalArticlepeer-review

Abstract

Inherent asymmetry in the tunneling barriers of few-electron quantum dots induces intrinsically different tunneling currents for forward and reverse source-drain biases in the nonlinear transport regime. We demonstrate that in addition to spin selection rules, overlap matrix elements between many-body states are crucial for the correct description of tunneling transmission through quantum dots at large magnetic fields. Signatures of excited (N-1) -electron states in the transport process through the N -electron system are clearly identified in the measured transconductances. Overall, the computed current spectra are found to be in very good agreement with the experimental data.

Original languageEnglish (US)
Article number165340
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume77
Issue number16
DOIs
StatePublished - Apr 30 2008

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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