A cross-whiskers junction as a novel fabrication process for intrinsic Josephson junctions
A cross-whiskers junction as a novel fabrication process for intrinsic Josephson junctions
复制标题
交叉晶须结作为本征约瑟夫森结的新颖制造工艺
DOI：
10.1088/0953-2048/14/9/327
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发表时间：
2001
影响因子：
3.6
通讯作者：
K. Togano
中科院分区：
文献类型：
--
作者：
Y. Takano;T. Hatano;Akihiro Fukuyo;A. Ishii;S. Arisawa;M. Tachiki;K. Togano
在不使用任何微加工技术的情况下，成功地发现了一种新型的本征约瑟夫森结Bi_2Sr_2CaCu_2O_（8 +δ）交叉晶须结。将两个Bi 2Sr 2CaCu 2 O 8 +δ晶须晶体在MgO衬底上连续放置并在850 °C下加热30 min。在晶须的四个末端制作测量端子。在5 K下的交叉晶须结的I-V特性被发现显示出清晰的多分支结构，其间距约为15 mV，这是本征约瑟夫森结的特征。临界电流密度JC估计为1170 A cm-2。分支结构被强烈抑制的磁场高于1千奥斯特。
A Bi2Sr2CaCu2O8+δ cross-whiskers junction has been successfully discovered as a novel intrinsic Josephson junction without using any technique for micro-fabrication. Two Bi2Sr2CaCu2O8+δ whisker crystals were placed crosswise on a MgO substrate and heated at 850 °C for 30 min. They were electrically connected at their c-planes. The measurement terminals were made at the four ends of the whiskers. The I-V characteristics of the cross-whiskers junction at 5 K were found to show a clear multiple-branch structure with a spacing of approximately 15 mV, which is a feature of an intrinsic Josephson junction. The critical current density JC was estimated to be 1170 A cm-2. The branch structure was strongly suppressed by a magnetic field above 1 kOe.