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arXiv 1204.4697cond-mat.supr-concond-mat.mes-hall
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无序超导体局域态密度的介观变化

Mesoscopic variations of local density of states in disordered superconductors

A. E. Koshelev, A. A. Varlamov

摘要:

我们探讨了不纯超导体的非均匀局域态密度(LDOS)的相关性与不同对称性的序参量(s-波和d-波)和不同类型的散射体(弹性和磁性杂质)。结果表明,超导体的LDoS关联函数总是随着距离的增加而缓慢减小,直到断相长度$l_ϕ$,并且其长程空间行为与正常金属一样,仅由维数决定.另一方面,该关联函数的能量依赖性对序参量的对称性和散射体的性质敏感。只有在具有弹性散射体的s波超导体的最简单情况下,非均匀LDoS才与正常金属的相应特性直接相关。

英文摘要:

We explore correlations of inhomogeneous local density of states (LDoS) for impure superconductors with different symmetries of the order parameter (s-wave and d-wave) and different types of scatterers (elastic and magnetic impurities). It turns out that the LDoS correlation function of superconductor always slowly decreases with distance up to the phase-breaking length $l_ϕ$ and its long-range spatial behavior is determined only by the dimensionality, as in normal metals. On the other hand, the energy dependence of this correlation function is sensitive to symmetry of the order parameter and nature of scatterers. Only in the simplest case of s-wave superconductor with elastic scatterers the inhomogeneous LDoS is directly connected to the corresponding characteristics of normal metal.

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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