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Comment on ``T-dependence of the magnetic penetration depth in unconventional superconductors at low temperatures: Can it be linear?"

P. J. Hirschfeld, M. -R. Li, P. Wölfle

cond-mat.supr-conarXiv:cond-mat/9806085

Abstract

We comment on a recent letter by Schopohl and Dolgov (SD) which raised the possibility that a d-wave superconductor might be thermodynamically unstable in the limit T 0. The point of our comment is that this instability can be inevitably prevented by the non-local effects.

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