中国物理B ›› 2019, Vol. 28 ›› Issue (6): 68501-068501.doi: 10.1088/1674-1056/28/6/068501
• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇 下一篇
Lanruo Wang(王兰若), Jinjin Li(李劲劲), Wenhui Cao(曹文会), Yuan Zhong(钟源), Zhonghua Zhang(张钟华)
Lanruo Wang(王兰若)1, Jinjin Li(李劲劲)2,3, Wenhui Cao(曹文会)2,3, Yuan Zhong(钟源)2,3, Zhonghua Zhang(张钟华)2,3
摘要:
The design, fabrication, and the characterization of a 0.5-V Josephson junction array device are presented for the quantum voltage standards in the National Institute of Metrology (NIM) of China. The device consists of four junction arrays, each of which has 1200 3-stacked Nb/NbxSi1-x/Nb junctions and an on-chip superconducting microwave circuit which is mainly a power divider enabling each Josephson array being loaded with an equal amount of microwave power. A direct current (dc) quantum voltage of about 0.5 V with a~1 -mA current margin of the 1st quantum voltage step is obtained. To further prove the quality of NIM device, a comparison between the NIM device with the National Institute of Standards and Technology (NIST) programmable Josephson voltage standard (PJVS) system device is conducted. The difference of the reproduced 0.5-V quantum voltage between the two devices is about 0.55 nV, which indicates good agreement between the two devices. With the homemade device, we have realized a precise and applicable 0.5-V applicable-level quantum voltage.
中图分类号: (Josephson devices)