RF-induced steps in intrinsic Josephson junctions in Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub y/
RF-induced steps in intrinsic Josephson junctions in Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub y/
复制标题
Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub y/ 中固有约瑟夫森结中的射频诱导阶跃
DOI：
--
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
G. Oya
中科院分区：
文献类型：
--
作者：
A. Irie;Y. Kurosu;G. Oya
研究了Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub y/单晶中本征约瑟夫森结的射频诱导台阶。通过向梅萨施加频率范围为2-20 GHz的RF信号，观察到取决于所施加微波的频率的两种类型的响应。一种是在表面结的约瑟夫森等离子体频率以上的频率处观察到的Shapiro阶跃响应。另一个是表面和内部连接处的微波诱导涡流响应。我们发现，结的尺寸也是观察到夏皮罗台阶的关键条件，外加微波的频率。
We have investigated the RF-induced steps in intrinsic Josephson junctions in mesa-shaped Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub y/ single crystals. By applying RF signal in the frequency range 2-20 GHz to the mesa, two types of responses were observed depending on the frequency of the applied microwave. One is the Shapiro step response observed at the frequencies above the Josephson plasma frequency for surface junction. Another is the microwave-induced vortex flow response for surface and inner junctions. We found that the junction size is also the key condition for the observation of Shapiro steps together with the frequency of applied microwave.