Stationary waves in a superfluid exciton gas in quantum Hall bilayers
Abstract
Stationary waves in a superfluid magnetoexciton gas in nu = 1 quantum Hall bilayers are considered. The waves are induced by counter-propagating electrical currents that flow in a system with a point obstacle. It is shown that stationary waves can emerge only in imbalanced bilayers in a certain diapason of currents. It is found that the stationary wave pattern is modified qualitatively under a variation of the ratio of the interlayer distance to the magnetic length d/l. The advantages of use graphene-dielectric-graphene sandwiches for the observation of stationary waves are discussed. We determine the range of parameters (the dielectric constant of the layer that separates two graphene layers and the ratio d/l) for which the state with superfluid magnetoexcitons can be realized in such sandwiches. Typical stationary wave patterns are presented as density plots
Keywords
Cite
@article{arxiv.1103.0165,
title = {Stationary waves in a superfluid exciton gas in quantum Hall bilayers},
author = {A. A. Pikalov and D. V. Fil},
journal= {arXiv preprint arXiv:1103.0165},
year = {2015}
}
Comments
17 pages, 8 figures