YBa2Cu3Ox/PrBa2Cu3Ox/YBa2Cu3Ox Josephson ramp junctions
YBa2Cu3Ox/PrBa2Cu3Ox/YBa2Cu3Ox Josephson ramp junctions
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YBa2Cu3Ox/PrBa2Cu3Ox/YBa2Cu3Ox 约瑟夫森斜坡结
DOI：
10.1063/1.351835
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发表时间：
1992
影响因子：
3.2
通讯作者：
H. Rogalla
中科院分区：
文献类型：
--
作者：
Jun Gao;Y. Boguslavskij;B. Klopman;D. Terpstra;R. A. Wijbrans;G. Gerritsma;H. Rogalla
详细研究了YBa 2Cu 3 Ox（YBCO）/PrBa 2Cu 3 Ox（PBCO）/YBCO斜坡结的制备工艺、电流-电压（I-V）特性、约瑟夫森特性和正常态特性。I-V特性可以很好地描述的并联结模型。发现临界电流Ic和正常态电导1/Rn与结面积成线性比例，而Ic、过电流Iex和IcRn乘积随着势垒厚度的增加而减小。这些具有横截面积A的结具有良好的可控性、低电容和高IcRn和RnA乘积值。PBCO势垒的相干长度λ n估计在5和8 nm之间。作为约瑟夫森行为的明确证据，微波响应作为微波功率的函数以及临界电流Ic（H）与外加磁场的调制。已观察到大于95%的调制深度。小邻近效应参数与Jun...
A detailed study of the fabrication process, current voltage (I‐V) characteristics, and Josephson and normal‐state properties of the YBa2Cu3Ox(YBCO)/PrBa2Cu3Ox(PBCO)/YBCO ramp junctions is presented. The I‐V characteristics can be well described by the resistively shunted junction model. It was found that the critical current Ic and the normal‐state conductance 1/Rn scale linearly with the junction area, whereas Ic, the excess current Iex, and IcRn products decrease with increasing barrier thickness. These junctions with cross‐sectional area A have a good controllability, low capacitance, and high values of IcRn and RnA products. The coherence length ξn of the PBCO barrier is estimated to be between 5 and 8 nm. As unambiguous evidence of the Josephson behavior, the microwave response as a function of the microwave power as well as the modulations of critical current Ic(H) with applied magnetic field are shown. A modulation depth of more than 95% has been observed. Small proximity effect parameters and jun...