论文标题
可控的超电流中的超导体非正式金属 - 金属铁磁铁杂交式约瑟夫森结构
Controllable supercurrent in mesoscopic superconductor-normal metal-ferromagnet crosslike Josephson structures
论文作者
论文摘要
在纳米制动的平面S-N/F-S Josephson结构中，通过实验观察到了通过正常的金属/铁磁性链接从单个结构域的铁磁条中观察到的正常金属/铁磁性连接的临界Josephson Supercurrent对注射电流的非单调依赖性。这种行为是由0-PI和PI-0转变来解释的，这可能是由于N和F层之间相互作用以及将自旋偏振电流注入到弱环节中引起的诱导超导性的抑制和Zeeman划分引起的。考虑了这两种效果的模型。它显示了实验结果与理论模型之间的定性一致性，该模型在S-N/F-S结构状态的光谱超携带密度与自旋依赖性双步非平衡准粒子分布方面。
A nonmonotonic dependence of the critical Josephson supercurrent on the injection current through a normal metal/ferromagnet weak link from a single domain ferromagnetic strip has been observed experimentally in nanofabricated planar crosslike S-N/F-S Josephson structures. This behavior is explained by 0-pi and pi-0 transitions, which can be caused by the suppression and Zeeman splitting of the induced superconductivity due to interaction between N and F layers, and the injection of spin-polarized current into the weak link. A model considering both effects has been developed. It shows the qualitative agreement between the experimental results and the theoretical model in terms of spectral supercurrent-carrying density of states of S-N/F-S structure and the spin-dependent double-step nonequilibrium quasiparticle distribution.
