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

V. F. Kozhevnikov, C. V. Giuraniuc, M. J. Van Bael, K. Temst, C. Van Haesendonck, T. M. Mishonov, T. Charlton, R. M. Dalgliesh, Yu N. Khaidukov, Yu V. Nikitenko, V. L. Aksenov, V. N. Gladilin, V. M. Fomin, J. T. Devreese, J. O. Indekeu

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8 Citations (Scopus)

Abstract

Polarized neutron reflectometry (PNR) provides evidence that nonlocal electrodynamics governs the magnetic field penetration in a low- κ superconductor. The sample is an In film with a large elastic mean-free path. 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.

Original languageEnglish
Article number012502
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume78
Issue number1
DOIs
Publication statusPublished - 10 Jul 2008
Externally publishedYes

Bibliographical note

We thank A. Volodin for AFM, S. Vandezande for resistivity, and A. P. Kobzev for RBS measurements. This research was supported by the KULeuven Research Council (Grants No. F/05/049 and GOA/2004/02), Projects No. G.0237.05, G.0115.06, and G.0356.06 of FWO-Vlaanderen, IUAP P5/1, the European Commission under the 6th Framework Programme through the Key Action: Strengthening the European Research Area, Research Infrastructures (Contract No. HII3-CT-2003-505925), Russian State (Contract No. 2007-3-1.3-07-01), INTAS (Grant No. 03-51-6426), and RFBR (Project No. 06-02-16221).

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