标题： 六边形氮化硼封装石墨烯场效应晶体管中的电子泊肃叶流 显示英文标题

标题： Electronic Poiseuille Flow in Hexagonal Boron Nitride Encapsulated Graphene FETs

摘要： 电子-电子相互作用在石墨烯中足够强，以引发一种相关且动量守恒的流动，使得载流子的行为类似于经典流体的哈根-泊肃叶流动。 在当前的研究中，我们研究了高迁移率石墨烯场效应晶体管中这种粘性电荷流动的电子特征。 在两种互补的测量方案中，我们监测了不同通道宽度和不同有效电子温度下的石墨烯微分电阻。 通过结合这两种方法，在从178 K开始并延伸到室温的温度范围内验证了粘性效应的存在。 我们的实验结果得到了石墨烯通道的有限元计算的支持，这些计算还为表现出增强粘性效应的器件几何结构提供了设计指导。 在室温附近存在粘性效应，为功能性的水力器件开辟了途径，例如类似特斯拉阀的几何整流器和基于电子文丘里效应的电荷放大器。 显示英文摘要

摘要： Electron-electron interactions in graphene are sufficiently strong to induce a correlated and momentum-conserving flow such that charge carriers behave similarly to the Hagen-Poiseuille flow of a classical fluid. In the current work, we investigate the electronic signatures of such a viscous charge flow in high-mobility graphene FETs. In two complementary measurement schemes, we monitor differential resistance of graphene for different channel widths and for different effective electron temperatures. By combining both approaches, the presence of viscous effects is verified in a temperature range starting from 178 K and extending up to room temperature. Our experimental findings are supported by finite element calculations of the graphene channel, which also provide design guidelines for device geometries that exhibit increased viscous effects. The presence of viscous effects near room temperature opens up avenues for functional hydrodynamic devices such as geometric rectifiers like a Tesla valve and charge amplifiers based on electronic Venturi effect.