Spin-Pseudospin Coherence and CP$^{3}$ Skyrmions in Bilayer Quantum Hall Ferromagnets
Mesoscale and Nanoscale Physics
2009-10-31 v2 Strongly Correlated Electrons
Abstract
We analyze bilayer quantum Hall ferromagnets, whose underlying symmetry group is SU(4). Spin-pseudospin coherence develops spontaneously when the total electron density is low enough. Quasiparticles are CP^3 skyrmions. One skyrmion induces charge modulations on both of the two layers. At the filling factor one elementary excitation consists of a pair of skyrmions and its charge is . Recent experimental data due to Sawada et al. [Phys. Rev. Lett. {\bf 80}, 4534 (1998)] support this conclusion.
Cite
@article{arxiv.cond-mat/9812188,
title = {Spin-Pseudospin Coherence and CP$^{3}$ Skyrmions in Bilayer Quantum Hall Ferromagnets},
author = {Z. F. Ezawa},
journal= {arXiv preprint arXiv:cond-mat/9812188},
year = {2009}
}
Comments
4 pages including 2 figures (published version)