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Gauge fluctuations and transition temperature for superconducting wires

机译:超导线的规格波动和转变温度

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In this paper we generalize to wires results recently obtained for superconducting films [L.M. Abreu, A.P.C. Malbouisson, I. Roditi, Eur. Phys. J. B 37 (2004) 515]. We consider the Ginzburg-Landau model, constrained to an infinitely long rectangular wire of cross-section L-1 x L-2, gauge contributions being implemented by means of the Gaussian effective potential in the transverse unitarity gauge. We obtain equations for the critical temperature as a function of the wire transverse dimensions, L-1,L-2, and of the bulk transition temperature To, and determine the limiting sizes sustaining the transition. A superconducting film is achieved as the limit of one of the L-i's going to infinity, while the other one is kept fixed at a finite value (the film thickness). A qualitative comparison with some experimental observations is done. (c) 2005 Elsevier B.V. All rights reserved.
机译:在本文中,我们归纳为最近获得的有关超导薄膜的导线结果[L.M. Abreu,A.P.C.马尔布瓦松(I. Roditi),欧洲。物理J.B 37(2004)515]。我们考虑Ginzburg-Landau模型,该模型被约束为横截面为L-1 x L-2的无限长矩形导线,通过横向统一性量规中的高斯有效势来实现量规贡献。我们获得了临界温度的方程,该临界温度是线材横向尺寸L-1,L-2和整体转变温度To的函数,并确定了维持转变的极限尺寸。实现了超导薄膜,这是因为L-i的其中一个达到无穷大,而另一个则保持固定在一个有限值(薄膜厚度)。与一些实验观察结果进行了定性比较。 (c)2005 Elsevier B.V.保留所有权利。

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