Charge-localization and isospin-blockade in vertical double quantum dots
Mesoscale and Nanoscale Physics
2007-05-23 v1
Abstract
Charge localization seems unlikely to occur in two vertically coupled symmetric quantum dots even if a small bias voltage breaks the exact isospin-symmetry of the system. However for a three-electron double quantum dot we find a strong localization of charges at certain vertically applied magnetic fields. The charge localization is directly connected to new ground state transitions between eigenstates differing only in parity. The transitions are driven by magnetic field dependent Coulomb correlations between the electrons and give rise to strong isospin blockade signatures in transport through the double dot system.
Cite
@article{arxiv.cond-mat/0401429,
title = {Charge-localization and isospin-blockade in vertical double quantum dots},
author = {David Jacob and Bernhard Wunsch and Daniela Pfannkuche},
journal= {arXiv preprint arXiv:cond-mat/0401429},
year = {2007}
}
Comments
10 pages, 4 figures