Shell Filling and Spin Effects in a Few Electron Quantum Dot

S. Tarucha, D. G. Austing, T. Honda, R. J. van der Hage, and L. P. Kouwenhoven
Phys. Rev. Lett. 77, 3613 – Published 21 October 1996
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Abstract

We study atomiclike properties of artificial atoms by measuring Coulomb oscillations in vertical quantum dots containing a tunable number of electrons starting from zero. At zero magnetic field the energy needed to add electrons to a dot reveals a shell structure for a two-dimensional harmonic potential. As a function of magnetic field the current peaks shift in pairs, due to the filling of electrons into spin-degenerate single-particle states. When the magnetic field is sufficiently small, however, the pairing is modified, as predicted by Hund's rule, to favor the filling of parallel spins.

  • Received 20 May 1996

DOI:https://doi.org/10.1103/PhysRevLett.77.3613

©1996 American Physical Society

Authors & Affiliations

S. Tarucha, D. G. Austing, and T. Honda

  • NTT Basic Research Laboratories, 3-1, Morinosoto Wakamiya, Atsugi-shi, Kanagawa 243-01, Japan

R. J. van der Hage and L. P. Kouwenhoven

  • Department of Applied Physics, Delft University of Technology, PO Box 5046, 2600 GA Delft, The Netherlands

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Vol. 77, Iss. 17 — 21 October 1996

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