Overdamped NbN Josephson junctions based on Nb/AlOx/Nb trilayer technology

被引：5
作者：
Iwai, T
Aoyama, T
Oke, R
Akaike, H
Fujimaki, A
Hayakawa, H
机构：
[1] Nagoya Univ, Dept Quantum Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan
[2] Nagoya Univ, Ctr Cooperat Res Adv Sci & Technol, Chikusa Ku, Nagoya, Aichi 4648603, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 1999年 / 38卷 / 8B期
关键词：
superconductor; NbN; Nb/AlOx/Nb technology; 10 K operation; overdamped junction; Josephson junction; S-N-I-N-S;
D O I：
10.1143/JJAP.38.L929
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have Fabricated overdamped NbN Josephson junctions based on Nb/AlOx/Nb trilayer technology. The junctions have the structure of NbN/Nb/AlOx/Nb/NbN, where Nb/AlOx/Nb acts as a junction barrier. The overdamped junctions showed a critical current density J(c) and characteristic voltage as high as 0.44 kA/cm(2) and 160 mu V at 10 K, respectively. The junction characteristics at 4.2 K were investigated from the viewpoint of their dependence on the film thickness of the Nb layers. The junction uniformity was also evaluated. The standard deviation, 1 - sigma, was 2.1% for a series of 64 5 x 5 mu m(2) junctions at 4.2 K.
引用
收藏
页码：L929 / L931
页数：3
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