Topological competition of superconductivity in Pb/Ru/Sr2RuO4 junctions
Topological competition of superconductivity in Pb/Ru/Sr2RuO4 junctions
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DOI：
10.1103/physrevb.84.060512
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发表时间：
2011-08-23
影响因子：
3.7
通讯作者：
Maeno, Y.
中科院分区：
文献类型：
--
作者：
Nakamura, Taketomo;Nakagawa, R.;Maeno, Y.
我们设计了一个非常规的邻近结配置的s波超导性和超导性的Sr 2 RuO 4相互干扰。我们可重复地观察到，在这样的Pb/Ru/Sr_2RuO_4结与一个单一的Pb电极，临界电流I-c急剧下降，只是低于体的Tc的Sr_2RuO_4和进一步增加再次低于一定的温度低于Tc。为了解释这种温度依赖性的I-C，我们提出了一个竞争效应，涉及周围的Ru夹杂物拓扑不同的超导相。因此，这样的器件可以被称为拓扑超导结。
We devise an unconventional proximity junction configuration where an s-wave superconductivity and the superconductivity of Sr2RuO4 interfere with each other. We reproducibly observe in such a Pb/Ru/Sr2RuO4 junction with a single Pb electrode that the critical current I-c drops sharply just below the bulk T-c of Sr2RuO4 and furthermore increases again below a certain temperature below T-c. In order to explain this temperature dependence of I-c, we propose a competition effect involving topologically distinct superconducting phases around Ru inclusions. Thus, such a device may be called a topological superconducting junction.