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APS » Journals » Phys. Rev. Lett. » Volume 89 » Issue 14
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Phys. Rev. Lett. 89, 147004 (2002) [4 pages]

Singular Current Response from Isolated Impurities in d-Wave Superconductors

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Shan-Wen Tsai1 and P. J. Hirschfeld1,2
1Department of Physics, University of Florida, P.O. Box 118440, Gainesville, Florida 32611
2Center for Electronic Correlations and Magnetism, EP6, University of Augsburg, Augsburg, Germany

Received 16 March 2002; published 16 September 2002

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 λ(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.

© 2002 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.147004
DOI:
10.1103/PhysRevLett.89.147004
PACS:
74.25.Fy, 74.25.Gz, 74.40.+k, 74.80.–g
 
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