Evidence for nonmonotonic magnetic field penetration in a type-I superconductor

Details Evidence for nonmonotonic magnetic field penetration in a type-I superconductor Evidence for nonmonotonic magnetic field penetration in a type-I superconductor

2007-04-14

arxiv.org/abs/0704.1872v2

Physics

Condensed Matter

Superconductivity

5 pages, 4 figures, LaTex, corrected typos and figures

Scientific paper

10.1103/PhysRevB.78.012502

Polarized neutron reflectometry (PNR) provides evidence that nonlocal electrodynamics governs the magnetic field penetration in an extreme low-k superconductor. The sample is an indium film with a large elastic mean free path (11 mkm) deposited on a silicon oxide wafer. It is shown that PNR can resolve the difference between the reflected neutron spin asymmetries predicted by the local and nonlocal theories of superconductivity. The experimental data support the nonlocal theory, which predicts a nonmonotonic decay of the magnetic field.

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