title: Stationary waves in a superfluid exciton gas in quantum Hall bilayers.
abstract: Stationary waves in a superfluid magnetoexciton gas in ν = 1 quantum Hall bilayers are considered. The waves are induced by counterpropagating 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 [Formula: see text]. The advantages of using 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.
authors.affiliation: Institute for Single Crystals National Academy of Sciences, Lenin avenue 60, Kharkov 61001, Ukraine.
authors.forename: A A
authors.initials: AA
authors.lastname: Pikalov
authors.forename: D V
authors.initials: DV
authors.lastname: Fil
mesh_terms: D004553:Electric Conductivity; D004574:Electromagnetic Fields; D005740:Gases; D008560:Membrane Fluidity; D008567:Membranes, Artificial; D008956:Models, Chemical; D049329:Nanostructures / Q000737:chemistry*; D010539:Permeability; D011789:Quantum Theory
chemical_list: D005740:Gases; D008567:Membranes, Artificial