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arXiv 0906.5403math.APmath-phmath.MP
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强磁场下Ginzburg-Landau的薄膜极限

Thin film limits for Ginzburg--Landau with strong applied magnetic fields

Stan Alama, Lia Bronsard, Bernardo Galvão-Sousa

摘要:

在这项工作中,我们研究了全三维Ginzburg-Landau模型的超导体在倾斜取向的磁场中的薄膜极限。我们得到伽玛收敛的结果,在几个制度,由平行施加的磁场的大小和膜的厚度之间的渐近比。根据制度,我们表明,可能会有一个减少的密度库珀对。我们还表明,在可变厚度的薄膜的情况下,其几何形状将影响有效施加的磁场,从而影响涡旋的位置。

英文摘要:

In this work, we study thin-film limits of the full three-dimensional Ginzburg-Landau model for a superconductor in an applied magnetic field oriented obliquely to the film surface. We obtain Gamma-convergence results in several regimes, determined by the asymptotic ratio between the magnitude of the parallel applied magnetic field and the thickness of the film. Depending on the regime, we show that there may be a decrease in the density of Cooper pairs. We also show that in the case of variable thickness of the film, its geometry will affect the effective applied magnetic field, thus influencing the position of vortices.

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