Charge 2e skyrmions in bilayer graphene
Mesoscale and Nanoscale Physics
2009-08-13 v1 Strongly Correlated Electrons
Abstract
Quantum Hall states that result from interaction induced lifting of the eight-fold degeneracy of the zeroth Landau level in bilayer graphene are considered. We show that at even filling factors electric charge is injected into the system in the form of charge skyrmions. This is a rare example of binding of charges in a system with purely repulsive interactions. We calculate the skyrmion energy and size as a function of the Zeeman interaction, and discuss signatures of the charge skyrmions in the scanning tunneling microscopy experiments.
Cite
@article{arxiv.0904.0040,
title = {Charge 2e skyrmions in bilayer graphene},
author = {D. A. Abanin and S. A. Parameswaran and S. L. Sondhi},
journal= {arXiv preprint arXiv:0904.0040},
year = {2009}
}
Comments
5 pages, 1 figure