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