paper

Nonlocal Effects on the Magnetic Penetration Depth in d-wave Superconductors

arXiv:cond-mat/9702199 · doi:10.1103/PhysRevLett.79.135

Abstract

We show that, under certain conditions, the low temperature behavior of the magnetic penetration depth of a pure d-wave superconductor is determined by nonlocal electrodynamics and, contrary to the general belief, the deviation is proportional to T^2 and not T. We predict that the dependence, due to nonlocality, should be observable experimentally in nominally clean high-T_c superconductors below a crossover temperature . Possible complications due to impurities, surface quality and crystal axes orientation are discussed.

REVTeX3.0; 4 pages, 1 EPS figure (included); Submitted to Phys. Rev. Lett

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