Tunneling between dissimilar high-T(c) oxide superconductors.
Tunneling between dissimilar high-T(c) oxide superconductors.
复制标题
不同的高 T(c) 氧化物超导体之间的隧道效应。
DOI：
10.1103/physrevlett.89.017005
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发表时间：
2002
影响因子：
8.6
通讯作者：
I. Iguchi
中科院分区：
文献类型：
--
作者：
T. Imaizumi;T. Kawai;T. Uchiyama;I. Iguchi
我们首次成功地制备和测量了具有不同氧化物电极YBa（2）Cu（3）O（7-y）和Bi（2）Sr（2）CaCu（2）O（y）的高T（c）异质结。根据隧道电阻的大小，可以观察到不同种类的结特性。在较高的隧道电阻下，清楚地观察到对应于两个间隙的间隙结构，从而确保传统的隧道方案对于这种几何形状也是有效的。零偏压电导峰的特殊行为也是可观察的。约瑟夫森电流被发现在这些不同的超导体之间流动。
We report the first successful fabrication and measurement of high-T(c) heterojunctions with different oxide electrodes, YBa(2)Cu(3)O(7-y) and Bi(2)Sr(2)CaCu(2)O(y). Different kinds of junction characteristics are observable according to the magnitude of the tunnel resistance. With higher tunnel resistance, gap structures corresponding to two gaps are clearly observed, ensuring that the conventional tunneling scheme is also valid for this geometry. Peculiar behavior for the zero bias conductance peak is also observable. Josephson current is found to flow between these dissimilar superconductors.