Direct observation of nonlocal effects in a superconductor |
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Authors: | Suter A Morenzoni E Khasanov R Luetkens H Prokscha T Garifianov N |
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Affiliation: | Laboratory for Muon Spin Spectroscopy, PSI, CH-5232 Villigen PSI, Switzerland. andreas.suter@psi.ch |
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Abstract: | We have used the technique of low energy muon spin rotation to measure the local magnetic field profile B(z) beneath the surface of a lead film maintained in the Meissner state (z depth from the surface, z less, similar 200 nm). The data unambiguously show that B(z) clearly deviates from an exponential law and represent the first direct, model independent proof for a nonlocal response in a superconductor. |
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