Mesoscopic variations of local density of states in disordered superconductors

Details Mesoscopic variations of local density of states in disordered superconductors Mesoscopic variations of local density of states in disordered superconductors

2012-04-20

arxiv.org/abs/1204.4697v1

Physics

Condensed Matter

Superconductivity

16 pages, 5 figures, to be submitted to Phys. Rev. B

Scientific paper

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 $l_{\phi}$ 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.

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