The half-filled Landau level - composite fermions and dipoles
Mesoscale and Nanoscale Physics
2009-10-31 v2
Abstract
The composite-fermion approach as formulated in the fermion Chern-Simons theory has been very successful in describing the physics of the lowest Landau level near Landau level filling factor 1/2. Recent work has emphasized the fact that the true quasiparticles at these filling factors are electrically neutral and carry an electric dipole moment. In a previous work, we discussed at length two formulations in terms of dipolar quasiparticles. Here we briefly review one approach - termed electron-centered quasiparticles - and show how it can be extended from 1/2 to nearby filling factors where the quasiparticles carry both an electric dipole moment and an overall charge.
Cite
@article{arxiv.cond-mat/9903430,
title = {The half-filled Landau level - composite fermions and dipoles},
author = {Felix von Oppen and Bertrand I. Halperin and Steven H. Simon and Ady Stern},
journal= {arXiv preprint arXiv:cond-mat/9903430},
year = {2009}
}
Comments
10 pages, minor improvements of notation and referencing