期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 23, 期 26, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/23/26/265301
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资金
- Ukraine State Program 'Nanotechnologies and nanomaterials [1.1.5.21]
Stationary waves in a superfluid magnetoexciton gas in nu = 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 d/l. 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.
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