Probing a Kondo-Correlated Quantum Dot with Spin Spectroscopy

D. Kupidura, M. C. Rogge, M. Reinwald, W. Wegscheider, and R. J. Haug
Phys. Rev. Lett. 96, 046802 – Published 1 February 2006

Abstract

We investigate the Kondo effect and spin blockade observed in a many-electron quantum dot and study the magnetic field dependence. At lower fields, a pronounced Kondo effect is found, which is replaced by the spin blockade at higher fields. In an intermediate regime, both effects are visible. We make use of this combined effect to gain information about the internal spin configuration of our quantum dot. We find that the data cannot be explained assuming regular filling of electronic orbitals. Instead, spin polarized filling seems to be probable.

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  • Received 14 September 2005

DOI:https://doi.org/10.1103/PhysRevLett.96.046802

©2006 American Physical Society

Authors & Affiliations

D. Kupidura1, M. C. Rogge1,*, M. Reinwald2, W. Wegscheider2, and R. J. Haug1

  • 1Institut für Festkörperphysik, Universität Hannover, Appelstraße 2, D-30167 Hannover, Germany
  • 2Angewandte und Experimentelle Physik, Universität Regensburg, D-93040 Regensburg, Germany

  • *Electronic address: rogge@nano.uni-hannover.de

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Vol. 96, Iss. 4 — 3 February 2006

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