Singular current response from isolated impurities in d-wave superconductors

Details Singular current response from isolated impurities in d-wave superconductors Singular current response from isolated impurities in d-wave superconductors

2002-03-15

arxiv.org/abs/cond-mat/0203330v2

Phys. Rev. Lett. 89, 147004 (2002)

Physics

Condensed Matter

Superconductivity

4 pages, 2 .eps figures. Minor changes to match the published version

Scientific paper

10.1103/PhysRevLett.89.147004

The current response of a d-wave superconductor containing a single impurity is calculated and shown to be singular in the low-temperature limit, leading in the case of strong scattering to a 1/T term in the penetration depth $\lambda(T)$ similar to that induced by Andreev surface bound states. For a small number of such impurities, we argue this low-$T$ upturn could be observable in cuprate superconductors.

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