论文标题
用于确定具有p-n连接的量子霍尔annuli的电阻的算法
Algorithms for determining resistances in quantum Hall annuli with p-n junctions
论文作者
论文摘要
石墨烯Corbino PNJ设备的一些有前途的应用包括二维DIRAC FERMION显微镜，自定义可编程量化的电阻器和中镜谷过滤器。在某些情况下，设备的可伸缩性至关重要，如电阻计量学等磁场所示，在这种磁场中，需要石墨烯设备以适应100μA的电流，以与现有的基础架构兼容。但是，这些设备的制造仍然带来许多困难。在这项工作中，在I = 2高原上保持的外延石墨烯Corbino P-N连接设备中观察到异常量化的电阻，并且与LTSpice电路模拟器进行的数值模拟一致。描述实验数据和模拟数据的公式是通过经验得出的，用于将多达三个当前终端的广义放置，并准确反映观察到的部分边缘通道的取消。这些结果支持使用紫外线光刻作为扩展基于石墨烯的设备的一种方法
Just a few of the promising applications of graphene Corbino pnJ devices include two-dimensional Dirac fermion microscopes, custom programmable quantized resistors, and mesoscopic valley filters. In some cases, device scalability is crucial, as seen in fields like resistance metrology, where graphene devices are required to accommodate currents of the order 100 μA to be compatible with existing infrastructure. However, fabrication of these devices still poses many difficulties. In this work, unusual quantized resistances are observed in epitaxial graphene Corbino p-n junction devices held at the i=2 plateau and agree with numerical simulations performed with the LTspice circuit simulator. The formulae describing experimental and simulated data are empirically derived for generalized placement of up to three current terminals and accurately reflects observed partial edge channel cancellation. These results support the use of ultraviolet lithography as a way to scale up graphene-based devices with suitably narrow junctions that could be applied in a variety of subfields
