Pikalov Alexandr A, Fil Dmitrii V
Institute for Single Crystals, National Academy of Sciences of Ukraine, Lenin ave, 60, Kharkov 61001, Ukraine.
Nanoscale Res Lett. 2012 Feb 21;7(1):145. doi: 10.1186/1556-276X-7-145.
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.
在本文中，我们参照嵌入多层介电结构中的两层石墨烯系统，研究空间间接磁激子气体的超流行为。该系统被视为砷化镓异质结构中双量子阱的替代物。我们确定了一系列能够实现磁激子超流性的参数范围（层间距离、介电常数、磁场和栅极电压）。计算了超流转变温度。评估了杂质导致的临界参数降低情况，并确定了临界杂质浓度。
