Role of a parallel magnetic field in two dimensional disordered clusters containing a few correlated electrons
Disordered Systems and Neural Networks
2015-06-24 v1 Mesoscale and Nanoscale Physics
Strongly Correlated Electrons
Abstract
An ensemble of 2d disordered clusters with a few electrons is studied as a function of the Coulomb energy to kinetic energy ratio r_s. Between the Fermi system (small r_s) and the Wigner molecule (large r_s), an interaction induced delocalization of the ground state takes place which is suppressed when the spins are aligned by a parallel magnetic field. Our results confirm the existence of an intermediate regime where the Wigner antiferromagnetism defavors the Stoner ferromagnetism and where the enhancement of the Lande g factor observed in dilute electron systems is reproduced.
Keywords
Cite
@article{arxiv.cond-mat/0012015,
title = {Role of a parallel magnetic field in two dimensional disordered clusters containing a few correlated electrons},
author = {Franck Selva and Jean-Louis Pichard},
journal= {arXiv preprint arXiv:cond-mat/0012015},
year = {2015}
}
Comments
4 pages, 3 figures