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arXiv 0906.4895cond-mat.supr-concond-mat.mes-hall
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自旋抽运对奇三重态超导电性的调谐

Tuning odd triplet superconductivity by spin pumping

Takehito Yokoyama, Yaroslav Tserkovnyak

摘要:

研究了具有旋进磁化的扩散铁磁体/正常金属/超导体结中的邻近效应。我们发现,在正常金属中诱导的奇频配对被铁磁体的自旋泵浦所改变,因此可以通过改变进动频率来调谐。在对应于两倍的超导能隙的频率,奇频配对强烈增强。我们发现了一个交叉,从正常的金属,通过调整进动频率的奇频超导。这给出了一个清晰的签名的奇频超导可观察到的扫描隧道显微镜。根据正常金属中的配对对称性,我们发现正常金属和扫描隧道显微镜针尖之间的隧穿电导中存在从能隙到峰结构的交叉。

英文摘要:

We study proximity effect in diffusive ferromagnet/normal-metal/superconductor junction with precessing magnetization of the ferromagnet. We find that the odd-frequency pairing induced in the normal metal is modified by spin pumping from the ferromagnet and hence can be tuned by changing the precessional frequency. At the frequency corresponding to twice the superconducting gap, the odd-frequency pairing is strongly enhanced. We find a crossover from the even- to the odd-frequency superconductivity in the normal metal by tuning the precessional frequency. This gives a clearcut signature of the odd-frequency superconductivity observable by scanning tunneling microscopy. According to the pairing symmetries in the normal metal, we find a crossover from the gap to the peak structure in the tunneling conductance between the normal metal and a scanning tunneling microscope tip.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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