Transport and noise properties of high Tc bicrystal junctions

被引：0
|
作者：
Enpuku, K [1 ]
Minotani, T [1 ]
Shiraishi, F [1 ]
Ohta, S [1 ]
机构：
[1] Kyushu Univ, Dept Elect Device Engn, Fukuoka 8128581, Japan
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 1999年 / 12卷 / 11期
关键词：
D O I：
10.1088/0953-2048/12/11/330
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Transport properties of YBa2Cu3O7-x, bicrystal junctions are studied from the relationship between the critical current I-c and the resistance R of the junction. The relation is obtained when misorientation angle of the junction is changed from 24 to 36.8 degrees. The experimental result can be well explained when two effects are taken into account in the tunnelling of electrons, i.e. resonant tunnelling of quasiparticles via localized states in an insulating barrier and d-wave symmetry of the superconducting order parameter. Low frequency 1/f noise of the junction is also measured, and the fluctuations of I-c and R are obtained as a function of junction parameters. A simple model of the barrier height fluctuation due to the capture and emission of electrons in the localized states can quantitatively explain the experimental results. The present model can consistently explain both the transport and noise characteristics of the bicrystal junction.
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收藏
页码：792 / 794
页数：3
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