Gate-tuned Josephson effect on the surface of a topological insulator.
Gate-tuned Josephson effect on the surface of a topological insulator.
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拓扑绝缘体表面的栅极调谐约瑟夫森效应
DOI：
10.1186/1556-276x-9-515
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发表时间：
2014
影响因子：
--
通讯作者：
Yang Y
中科院分区：
文献类型：
--
作者：
Bai C;Yang Y
在这项研究中，我们研究了超导体/正常金属/超导体结在拓扑绝缘体表面的约瑟夫森超电流，其中栅电极连接到正常金属。结果表明，约瑟夫森超电流不仅受温度的影响很大，而且还与势和弱连接区的长度有关。特别地，揭示了超临界电流的非对称性、振荡特性和平台状结构。我们排除了在最近的实验中观察到的那些现象.
In the study, we investigate the Josephson supercurrent of a superconductor/normal metal/superconductor junction on the surface of a topological insulator, where a gate electrode is attached to the normal metal. It is shown that the Josephson supercurrent not only can be tuned largely by the temperature but also is related to the potential and the length of the weak-link region. Especially, the asymmetry excess critical supercurrent, oscillatory character, and plateau-like structure have been revealed. We except those phenomena that can be observed in the recent experiment.