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首页> 外文期刊>Physical review >Evolution of the filamentary 3-Kelvin phase in Pb-Ru-Sr_2RuO_4 Josephson junctions
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Evolution of the filamentary 3-Kelvin phase in Pb-Ru-Sr_2RuO_4 Josephson junctions

机译:Pb-Ru-Sr_2RuO_4 Josephson结中丝状3-Kelvin相的演化

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摘要

The evolution of the filamentary 3-Kelvin (3-K) superconducting phase at the interface between Sr_2RuO_4 and Ru-metal inclusions is discussed for Pb-Ru-Sr_2RuO_4 contacts. Using the Ginzburg-Landau model, the influence of proximity-induced superconductivity in Ru on the topology of the 3-K phase is analyzed. Because the S-wave order parameter in Ru favors a 3-K state of trivial topology, the onset temperature of the phase with a nontrivial topology, which is compatible with the bulk phase of Sr_2RuO_4, is essentially reduced to the bulk transition temperature. Because the topology of the superconducting state in Sr_2RuO_4 is crucial for the Josephson effect through Pb-Ru-Sr_2RuO_4 contacts, this model qualitatively reproduces the experimental observation of the anomalous temperature dependence on the critical current.
机译:对于Pb-Ru-Sr_2RuO_4接触,讨论了在Sr_2RuO_4和Ru-金属夹杂物之间的界面上的丝状3-Kelvin(3-K)超导相的演化。使用Ginzburg-Landau模型,分析了Ru中邻近感应的超导性对3-K相拓扑结构的影响。由于Ru中的S波阶数参数有利于琐碎拓扑的3-K状态,因此与Sr_2RuO_4的主体相兼容的具有非琐碎拓扑的相的起始温度实质上降低到主体转变温度。由于Sr_2RuO_4中超导状态的拓扑对于通过Pb-Ru-Sr_2RuO_4接触的约瑟夫森效应至关重要,因此该模型定性地再现了异常温度对临界电流的依赖的实验观察。

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