论文标题
铁磁双层的约瑟夫森连接中的干扰现象：自旋 - 三个相关性和共鸣
Interference phenomena in Josephson junctions with ferromagnetic bilayers: Spin-triplet correlations and resonances
论文作者
论文摘要
我们研究了Planar $ SF_1F_2S $连接的Josephson效应，该效果由传统的$ S $ - 波浪超导体（$ s $）组成，由两个金属单域Ferromagnets（$ f_1 $ and $ f_2 $）连接，并具有任意接口透明度的固定性。我们基于Bogoliubov-De Gennes方程的旋转单词和频率旋转三键配对相关性的奇数解决了在清洁极限中解决散射问题。我们以数字计算Josephson Current-phase关系$ i（ϕ）$。 $ i（ϕ）$的第一个谐波完全由旋转式和短范围的自旋三个超导相关性产生，而对于铁磁层的非共线磁化，第二个谐波具有额外的远距离旋转式旋转组件。因此，对于强大的铁磁影响，远程自旋三核对第二个谐波的贡献占主导地位。我们发现由于第一个谐波强烈增强时相等的铁磁层的几何共振，我们发现了一个例外。由于$ 0-π$过渡，第一和第二谐波振幅都以铁磁层的厚度振荡。我们研究界面透明胶片的影响，并发现铁磁层之间界面有限透明度的其他共鸣。
We study the Josephson effect in planar $SF_1F_2S$ junctions that consist of conventional $s$-wave superconductors ($S$) connected by two metallic monodomain ferromagnets ($F_1$ and $F_2$) with arbitrary transparency of interfaces. We solve the scattering problem in the clean limit based on the Bogoliubov-de Gennes equation for both spin-singlet and odd in frequency spin-triplet pairing correlations. We calculate numerically the Josephson current-phase relation $I(ϕ)$. While the first harmonic of $I(ϕ)$ is completely generated by spin-singlet and short-range spin-triplet superconducting correlations, for noncollinear magnetizations of ferromagnetic layers the second harmonic has an additional long-range spin-triplet component. Therefore, for strong ferromagnetic influence, the long-range spin-triplet contribution to the second harmonic dominates. We find an exception due to the geometric resonance for equal ferromagnetic layers when the first harmonic is strongly enhanced. Both first and second harmonic amplitudes oscillate with ferromagnetic layer thicknesses due to $0-π$ transitions. We study the influence of interface transparencies and find additional resonances for finite transparency of interface between ferromagnetic layers.
