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arXiv 1004.4629cond-mat.supr-con
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石墨烯中的三重态邻近效应和奇频配对

Triplet proximity effect and odd-frequency pairing in graphene

Jacob Linder, Annica M. Black-Schaffer, Asle Sudbø

摘要:

通过自洽求解蜂窝晶格上的Bogoliubov-de Gennes方程,研究了石墨烯中邻近诱导超导性和铁磁性之间的相互作用。我们发现,一个强大的三重态邻近效应产生的石墨烯,导致奇频配对相关。这些奇频相关性在石墨烯片的局域态密度中清楚地表现出来,这可以通过STM测量来探测。受最近S $\mid$ N $\mid$ S石墨烯约瑟夫森结实验的启发,我们还研究了由于邻近效应在正常区域形成的Andreev束缚态的光谱。我们的结果可能是有用的解释光谱数据,也可以作为未来实验的指导方针。

英文摘要:

We study the interplay between proximity-induced superconductivity and ferromagnetism in graphene by self-consistently solving the Bogoliubov-de Gennes equations on the honeycomb lattice. We find that a strong triplet proximity effect is generated in graphene, leading to odd-frequency pairing correlations. These odd-frequency correlations are clearly manifested in the local density of states of the graphene sheet, which can be probed via STM-measurements. Motivated by recent experiments on S$\mid$N$\mid$S graphene Josephson junctions, we also study the spectrum of Andreev-bound states formed in the normal region due to the proximity effect. Our results may be useful for interpreting spectroscopic data and can also serve as a guideline for future experiments.

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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