Fractional periodicity and magnetism of extended quantum rings
Strongly Correlated Electrons
2009-11-13 v1 Mesoscale and Nanoscale Physics
Abstract
The magnetic properties and nature of the persistent current in small flux-penetrated rings are investigated. An effective rigid-rotator description is formulated for this system, which coincides with a transition to a ferromagnetic state in the model. The criteria for the onset of effective rigid rotation is given. The model is used to understand continuum model ground-state solutions for a 2D few-particle hard-wall quantum dot, where ferromagnetic solutions are found even without the Zeeman coupling to spin. After the onset of effective rigid rotation, a 97--98% correspondence can be determined between the lattice model and continuum model eigenstate results.
Keywords
Cite
@article{arxiv.0802.1108,
title = {Fractional periodicity and magnetism of extended quantum rings},
author = {Y. Hancock and J. Suorsa and E. Tölö and A. Harju},
journal= {arXiv preprint arXiv:0802.1108},
year = {2009}
}