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

Ioan Kosztin; Anthony J. Leggett

doi:10.1103/PhysRevLett.79.135

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

Ioan Kosztin, Anthony J. Leggett

DOI 10.1103/PhysRevLett.79.135 · Physical Review Letters

T1

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Abstract

We show that, under certain conditions, the low temperature behavior of the magnetic penetration depth λ(T) of a pure d-wave superconductor is determined by nonlocal electrodynamics and, contrary to the general belief, the deviation Δλ(T)=λ(T)−λ(0) is proportional to T2 and not T. We predict that the Δλ(T)∝T2 dependence, due to nonlocality, should be observable experimentally in nominally clean high- Tc superconductors below a crossover temperature T*=(ξ0/λ0)Δ0∼1 K. Possible complications due to impurities, surface quality, and crystal axes orientation are discussed.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
HgBa2Ca2Cu3O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown