Changes in the Magnetization of a Double Quantum Dot
Mesoscale and Nanoscale Physics
2009-10-31 v1
Abstract
From accurate measurements of the energy states in a double quantum dot we deduce the change in magnetization due to single electron tunneling. As a function of magnetic field we observe crossings and anti-crossings in the energy spectrum. The change in magnetization exhibits wiggles as a function of magnetic field with maximum values of a few effective Bohr magnetons in GaAs. These wiggles are a measure of the chaotic motion of the discrete energy states versus magnetic field. Our results show good agreement with a numeric calculation but deviate significantly from semiclassical estimates.
Cite
@article{arxiv.cond-mat/9802118,
title = {Changes in the Magnetization of a Double Quantum Dot},
author = {T. H. Oosterkamp and S. F. Godijn and M. J. Uilenreef and Y. V. Nazarov and N. C. van der Vaart and L. P. Kouwenhoven},
journal= {arXiv preprint arXiv:cond-mat/9802118},
year = {2009}
}
Comments
6 pages, plus 3 figures