论文标题
六角硼硝酸盐封装石墨烯Fets中的电子poiseuille流
Electronic Poiseuille Flow in Hexagonal Boron Nitride Encapsulated Graphene FETs
论文作者
论文摘要
石墨烯中的电子电子相互作用足够强，可以诱导相关且持有动量的流动，从而与经典流体的Hagen-Poiseuille流相似。在当前的工作中，我们研究了高动力石墨烯FET中这种粘性电荷流的电子特征。在两个互补的测量方案中，我们监测石墨烯对不同通道宽度和不同有效电子温度的差异电阻。通过结合两种方法，在从178 K开始至室温的温度范围内验证了粘性效应的存在。我们的实验发现得到了石墨烯通道的有限元计算的支持，该计算还为设备几何形状提供了设计指南，这些指南表现出增加的粘性效应。室温附近的粘性作用的存在为功能性流体动力设备（例如Tesla阀等几何整流器和基于电子文丘里效应的电荷放大器）提供了途径。
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.
