Collapse of the Zeeman gap in quantum dots due to electronic correlations

Pawel Hawrylak, Charles Gould, Andy Sachrajda, Yan Feng, and Zbig Wasilewski
Phys. Rev. B 59, 2801 – Published 15 January 1999
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Abstract

We present results of calculations and “lateral” magnetotunneling experiments on small quantum dots in the few-electron regime. In the transition from a spin-unpolarized to a spin-polarized droplet, a systematic oscillation of the chemical potential of the droplet as a function of the magnetic field correlates with oscillations in the current amplitude. The temperature dependence of the current minima indicates that the minima are associated with the collapse of the Zeeman gap in the quantum Hall droplet. The collapse of the Zeeman gap is associated with the nontrivial magnetic field dependence of the spin polarization of a quantum Hall droplet due to electronic correlations.

  • Received 7 August 1998

DOI:https://doi.org/10.1103/PhysRevB.59.2801

©1999 American Physical Society

Authors & Affiliations

Pawel Hawrylak, Charles Gould*, Andy Sachrajda, Yan Feng, and Zbig Wasilewski

  • Institute for Microstructural Sciences, National Research Council of Canada, Ottawa, Canada K1A 0R6

  • *Département de Physique and CRPS, Université de Sherbrooke, Sherbrooke, Quebec, Canada J1K 2R1.

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Vol. 59, Iss. 4 — 15 January 1999

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