Dissipationless transport in low density bilayer systems
Mesoscale and Nanoscale Physics
2009-10-31 v1
Abstract
In a bilayer electronic system the layer index may be viewed as the z-component of an isospin-1/2. An XY isospin-ordered ferromagnetic phase was observed in quantum Hall systems and is predicted to exist at zero magnetic field at low density. This phase is a superfluid for opposite currents in the two layers. At B=0 the system is gapless but superfluidity is not destroyed by weak disorder. In the quantum Hall case, weak disorder generates a random gauge field which probably does not destroy superfluidity. Experimental signatures include Coulomb drag and collective mode measurements.
Cite
@article{arxiv.cond-mat/9908251,
title = {Dissipationless transport in low density bilayer systems},
author = {Ady Stern and S. Das Sarma and Matthew P. A. Fisher and S. M. Girvin},
journal= {arXiv preprint arXiv:cond-mat/9908251},
year = {2009}
}
Comments
4 pages, no figures, submitted to Phys. Rev. Lett