We have studied the structure and dipole charge density response of nanorings as a function of the magnetic field using local-spin density functional theory. Two small rings consisting of 12 and 22 electrons confined by a positively charged background are used to represent the cases of a narrow and a wide ring. The results are qualitatively compared with experimental data existing on microrings and on antidots. A smaller ring containing 5 electrons is also analyzed to allow for a closer comparison with a recent experiment on a two electron quantum ring.
@article{arxiv.cond-mat/9902365,
title = {Magnetoplasmons in quantum rings},
author = {A. Emperador and M. Barranco and E. Lipparini and M. Pi and Ll. Serra},
journal= {arXiv preprint arXiv:cond-mat/9902365},
year = {2009}
}
Comments
Typeset using Revtex, 13 pages and 11 Postscript figures