Session B33: Superconductivity: Mostly Cuprates

11:15 AM–2:15 PM, Monday, March 16, 2009
Room: 403

Sponsoring Unit: DCMP
Chair: Timir Datta, University of South Carolina

Abstract ID: BAPS.2009.MAR.B33.8

Abstract: B33.00008 : Evidence for nonmonotonic magnetic field penetration in a Pippard superconductor

12:39 PM–12:51 PM

Preview Abstract MathJax On | Off   Abstract  

Authors:

  Vladimir Kozhevnikov
    (Tulsa Community College)

  Claudiu Giuraniuc
    (University of Lille)

  Margriet Van Bael
    (Katholieke Universiteit Leuven)

  Kristiaan Temst
    (Katholieke Universiteit Leuven)

  Chris Van Haesendonck
    (Katholieke Universiteit Leuven)

  Todor Mishonov
    (St Clement of Ohrid University at Sofia)

  Timothy Charlton
    (Rutherford Appleton Laboratory)

  Robert Dalgliesh
    ( Rutherford Appleton Laboratory)

  Yurii Khaidukov
    (Joint Institute for Nuclear Research)

  Yurii Nikitenko
    (Joint Institute for Nuclear Research)

  Victor Aksenov
    (Joint Institute for Nuclear Research)

  Vladimir Gladilin
    (Katholieke Universiteit Leuven)

  Vladimir Fomin
    (Universiteit Antwerpen)

  Jozef Devreese
    (Universiteit Antwerpen)

  Joseph Indekeu
    (Katholieke Universiteit Leuven)

Polarized neutron reflectometry (PNR) provides evidence that \textit{nonlocal }electrodynamics governs the magnetic field penetration in an extreme low-\textit{$\kappa $ }superconductor. The sample is an indium film with a large elastic mean free path (11 \textit{$\mu $}m) 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 and therefore can be used for direct measurements of the microscopic intrinsic parameters of superconductors. The experimental data support the nonlocal theory, which predicts a \textit{nonmonotonic decay }of the magnetic field.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2009.MAR.B33.8