d-like symmetry of the order parameter and intrinsic Josephson effects in Bi 2 Sr 2 CaCu 2 O 8+δ cross-whisker junctions
d-like symmetry of the order parameter and intrinsic Josephson effects in Bi 2 Sr 2 CaCu 2 O 8+δ cross-whisker junctions
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Bi 2 Sr 2 CaCu 2 O 8+δ 交叉晶须结中序参数的 d 对称性和固有约瑟夫森效应
DOI：
10.1103/physrevb.65.140513
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发表时间：
2002
影响因子：
3.7
通讯作者：
M. Tachiki
中科院分区：
文献类型：
--
作者：
Y. Takano;T. Hatano;Akihiro Fukuyo;A. Ishii;M. Ohmori;S. Arisawa;K. Togano;M. Tachiki
用两个Bi2Sr2CaCu2O8+ΦΦ单晶晶须制作了本征隧道结。两个具有交叉角的晶须在其c面上重叠，并通过退火连接。临界电流密度沿c轴的角依赖关系具有d波对称性。然而，这种角度依赖性比传统的d波要强得多。此外，交叉晶须结的电流-电压特性显示出在任意交叉角度处的多分支结构，表明形成了本征约瑟夫森结阵列。
An intrinsic tunnel junction was made using two Bi 2 Sr 2 CaCu 2 O 8 + Φ Φ single-crystal whiskers. The two whiskers with a cross angle were overlaid at their c planes and connected by annealing. The angular dependence of the critical current density along the c axis is of the d-wave symmetry. However, the angular dependence is much stronger than that of the conventional d wave. Furthermore, the current vs voltage characteristics of the cross-whisker junctions show a multiple-branch structure at any cross angle, indicating the formation of the intrinsic Josephson-junction array.