Signatures of Spin Pairing in Chaotic Quantum Dots

S. Lüscher, T. Heinzel, K. Ensslin, W. Wegscheider, and M. Bichler
Phys. Rev. Lett. 86, 2118 – Published 5 March 2001
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Abstract

Coulomb blockade resonances are measured in a GaAs quantum dot in which both shape deformations and interactions are small. The parametric evolution of the Coulomb blockade peaks shows a pronounced pair correlation in both position and amplitude, which is interpreted as spin pairing. As a consequence, the nearest-neighbor distribution of peak spacings can be well approximated by a modified bimodal Wigner surmise, in which interactions are taken into account beyond the constant interaction model.

  • Received 15 February 2000

DOI:https://doi.org/10.1103/PhysRevLett.86.2118

©2001 American Physical Society

Authors & Affiliations

S. Lüscher1, T. Heinzel1, K. Ensslin1, W. Wegscheider2,3, and M. Bichler3

  • 1Solid State Physics Laboratory, ETH Zürich, 8093 Zürich, Switzerland
  • 2Institut für Angewandte und Experimentelle Physik, Universität Regensburg, 93040 Regensburg, Germany
  • 3Walter Schottky Institut, TU München, 85748 Garching, Germany

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Vol. 86, Iss. 10 — 5 March 2001

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