Abstract Interlayer carrier scattering hampers electrical conduction in two-dimensional layered nanostructures. Extenuated carrier scattering is observed in a double-layered graphene system with hexagonal boron nitride ( h -BN) as an interposer. Raman spectrum shows signature peaks with enhanced sharpness as compared with that of bilayer graphene. The density functional theory simulation shows degenerate energy bands in the E-k dispersion. The decoupling of the two graphene monolayers is further confirmed by electrical conduction measurements. Improved carrier mobility is observed in the graphene/ h -BN/graphene heterostructure as compared with exfoliated or randomly-stacked graphene bilayer, indicating preserved Fermi velocity. The demonstrated behavior in graphene/ h -BN/graphene heterostructure suggests a pathway to preserve the excellent carrier transport of pristine graphene monolayer in a multi-channel configuration, leading to implementation of highly conductive 2D heterostructure systems.

中文翻译：

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双层石墨烯/六方氮化硼异质结构中减弱的层间散射

摘要 层间载流子散射阻碍二维层状纳米结构的导电。在具有六方氮化硼 (h -BN) 作为中介层的双层石墨烯系统中观察到减弱的载流子散射。与双层石墨烯相比，拉曼光谱显示了具有增强锐度的特征峰。密度泛函理论模拟显示 Ek 色散中的简并能带。导电测量进一步证实了两个石墨烯单层的去耦。与剥离或随机堆叠的石墨烯双层相比，在石墨烯/ h -BN/石墨烯异质结构中观察到改进的载流子迁移率，表明费米速度保持不变。