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arXiv 0807.4453cond-mat.supr-con
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d波超导体表面附近玻恩杂质散射的修正及外磁场的影响

Modification of Born impurity scattering near the surface of d-wave superconductors and influence of external magnetic field

A. Zare, A. Markowsky, T. Dahm, N. Schopohl

摘要:

研究了在有无外加磁场的情况下,玻恩杂质散射对d波超导体表面附近零能Andreev束缚态的影响.在没有外加磁场的情况下,我们发现玻恩杂质散射的影响在表面比在体部更强。在外加磁场的存在下,零能Andreev束缚态的分裂具有非单调的温度依赖性。出生杂质散射不洗出的峰分裂,但相反的峰分裂被证明是相当强大的杂质。我们还表明,一个非零的间隙重整化出现在表面附近。

英文摘要:

We study the influence of Born impurity scattering on the zero-energy Andreev bound states near the surface of a d-wave superconductor with and without an externally applied magnetic field. Without an external magnetic field we show that the effect of Born impurity scattering is stronger at the surface than in the bulk. In the presence of an external magnetic field the splitting of the zero-energy Andreev bound states is shown to have a nonmonotonous temperature dependence. Born impurity scattering does not wash out the peak splitting, but instead the peak splitting is shown to be quite robust against impurities. We also show that a nonzero gap renormalization appears near the surface.

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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