论文标题
制造具有多个量化电阻输出的均匀掺杂的石墨烯量子大厅阵列
Fabrication of uniformly doped graphene quantum Hall arrays with multiple quantized resistance outputs
论文作者
论文摘要
在这项工作中，通过厘米尺度，高质量的材料增长和实施超导接触的结合，取消了来自SIC上外延石墨烯的限制因素。计量学的标准设备仅限于基于$ν$ = 2 Landau级别的单个量化值输出。在此处的演示设备的演示中，具有同时可用的量化值的多个输出的设备，这些多功能设备可用于在全球范围内传播欧姆。此类设备旨在在三个数量级的范围内访问量化的电阻值，从而低至大约12.9 k $ω$的标准值，并达到高达1.29 m $ $ω$。几种实验方法用于评估设备的质量和多功能性，包括标准锁定技术和拉曼光谱法。
In this work, limiting factors for developing metrologically useful arrays from epitaxial graphene on SiC are lifted with a combination of centimeter-scale, high-quality material growth and the implementation of superconducting contacts. Standard devices for metrology have been restricted to having a single quantized value output based on the $ν$ = 2 Landau level. With the demonstrations herein of devices having multiple outputs of quantized values available simultaneously, these versatile devices can be used to disseminate the ohm globally. Such devices are designed to give access to quantized resistance values over the range of three orders of magnitude, starting as low as the standard value of approximately 12.9 k$Ω$ and reaching as high as 1.29 M$Ω$. Several experimental methods are used to assess the quality and versatility of the devices, including standard lock-in techniques and Raman spectroscopy.
