Specific capacitance of Nb/AlOx/Nb Josephson junctions with critical current densities in the range of 0.1–18 kA/cm2
Specific capacitance of Nb/AlOx/Nb Josephson junctions with critical current densities in the range of 0.1–18 kA/cm2
复制标题
临界电流密度在 0.1–18 kA/cm2 范围内的 Nb/AlOx/Nb 约瑟夫森结的比电容
DOI：
10.1063/1.113927
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
S. Takada
中科院分区：
文献类型：
--
作者：
M. Maezawa;M. Aoyagi;H. Nakagawa;I. Kurosawa;S. Takada
用超导量子干涉仪（SQUID）共振技术测量了Nb/AlOx/NbJosephson隧道结的比电容Cs。我们研究了临界电流密度Jc在0.1-18 kA/cm ~ 2范围内的结，发现1/Cs与Jc的对数成线性关系。这表明势垒厚度在结区中是适度均匀的，并且在生长期间连续增加。结果还表明，增加Jc减小了结的时间常数。
The specific capacitance Cs of Nb/AlOx/Nb Josephson tunnel junction has been measured by means of the superconducting quantum interference device (SQUID) resonance technique. We have investigated the junctions with critical current densities Jc in the range of 0.1–18 kA/cm2 and found that 1/Cs linearly depends on a logarithm of Jc. This suggests that the barrier thickness is moderately uniform in the junction area and increases continuously during growth. The results also show that increasing Jc reduces time constants of the junction.