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Transactions of the American Mathematical Society

ISSN 1088-6850(online) ISSN 0002-9947(print)



Surface superconductivity in $3$ dimensions

Author: Xing-Bin Pan
Journal: Trans. Amer. Math. Soc. 356 (2004), 3899-3937
MSC (2000): Primary 35Q55, 82D55
Published electronically: February 4, 2004
MathSciNet review: 2058511
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Abstract: We study the Ginzburg-Landau system for a superconductor occupying a $3$-dimensional bounded domain, and improve the estimate of the upper critical field $H_{C_{3}}$ obtained by K. Lu and X. Pan in J. Diff. Eqns., 168 (2000), 386-452. We also analyze the behavior of the order parameters. We show that, under an applied magnetic field lying below and not far from $H_{C_{3}}$, order parameters concentrate in a vicinity of a sheath of the surface that is tangential to the applied field, and exponentially decay both in the normal and tangential directions away from the sheath in the $L^{2}$ sense. As the applied field decreases further but keeps in between and away from $H_{C_{2}}$ and $H_{C_{3}}$, the superconducting sheath expands but does not cover the entire surface, and superconductivity at the surface portion orthogonal to the applied field is always very weak. This phenomenon is significantly different to the surface superconductivity on a cylinder of infinite height studied by X. Pan in Comm. Math. Phys., 228 (2002), 327-370, where under an axial applied field lying in-between $H_{C_{2}}$ and $H_{C_{3}}$ the entire surface is in the superconducting state.

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Additional Information

Xing-Bin Pan
Affiliation: Department of Mathematics, Zhejiang University, Hangzhou 310027, China – and – Department of Mathematics, National University of Singapore, Singapore 119260

Keywords: Ginzburg-Landau system, superconductivity, nucleation, upper critical field, Schrödinger operator with a magnetic field
Received by editor(s): October 12, 2001
Received by editor(s) in revised form: May 19, 2003
Published electronically: February 4, 2004
Article copyright: © Copyright 2004 American Mathematical Society