A universal Hamiltonian for a quantum dot in the presence of spin-orbit interaction
Mesoscale and Nanoscale Physics
2007-05-23 v1 Strongly Correlated Electrons
Abstract
We derive a universal Hamiltonian for a quantum dot in the presence of spin-orbit interaction in the symmetry limits of a strong spin-dependent Aharonov-Bohm-like term. We also derive a closed expression for the conductance through such a dot, and use it to study the effects of spin-orbit on the conductance peak statistics in the presence of an exchange interaction. For a realistic strength of the exchange interaction, we find that the width of the peak-spacing distribution is sensitive to spin-orbit coupling only in the absence of an orbital magnetic field. We also find that spin-orbit coupling modifies the shape of the peak-spacing distribution and suppresses the peak-height fluctuations.
Cite
@article{arxiv.cond-mat/0312691,
title = {A universal Hamiltonian for a quantum dot in the presence of spin-orbit interaction},
author = {Y. Alhassid and T. Rupp},
journal= {arXiv preprint arXiv:cond-mat/0312691},
year = {2007}
}
Comments
4 pages, 2 figures