Nano Express
Graphene bilayer structures with superfluid magnetoexcitons
Author affiliations
Institute for Single Crystals, National Academy of Sciences of Ukraine, Lenin ave. 60, Kharkov 61001, Ukraine
Citation and License
Nanoscale Research Letters 2012, 7:145 doi:10.1186/1556-276X-7-145
Published: 21 February 2012Abstract
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.
