title: Graphene bilayer structures with superfluid magnetoexcitons.
abstract: In this article, we study superfluid behavior of a gas of spatially indirect magnetoexcitons with reference to a system of two graphene layers embedded in a multilayer dielectric structure. The system is considered as an alternative of a double quantum well in a GaAs heterostructure. We determine a range of parameters (interlayer distance, dielectric constant, magnetic field, and gate voltage) where magnetoexciton superfluidity can be achieved. Temperature of superfluid transition is computed. A reduction of critical parameters caused by impurities is evaluated and critical impurity concentration is determined.
authors.affiliation: Institute for Single Crystals, National Academy of Sciences of Ukraine, Lenin ave, 60, Kharkov 61001, Ukraine. fil@isc.kharkov.ua.
authors.forename: Alexandr A
authors.initials: AA
authors.lastname: Pikalov
authors.forename: Dmitrii V
authors.initials: DV
authors.lastname: Fil