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arXiv 0901.2455cond-mat.supr-concond-mat.other
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斜置磁场中小约瑟夫森隧道结的静态特性

Static Properties of Small Josephson Tunnel Junctions in an Oblique Magnetic Field

R. Monaco, M. Aroe, J. Mygind, V. P. Koshelets

摘要:

我们对在相对于势垒平面任意方向上施加均匀外磁场的平面约瑟夫森隧道结的静态特性进行了详细的实验研究。我们考虑了环形结,以及矩形结(具有重叠和交叉型的几何形状)与不同的障碍纵横比。它显示了如何在斜场中的大多数实验结果可以再现调用叠加原理结合的经典行为的电小结在一个平面内的字段与小结的行为在一个横向的领域,我们最近发表[R.摩纳哥等人,J. Appl.Phys.vol 104,023906(2008)]。我们探讨这些结果的影响,假设系统误差在以前的实验中,并提出新的可能的应用。我们表明,横向场的存在可能会产生重要的后果,这可能是自愿利用的应用程序或提出一个不必要的扰动。

英文摘要:

We have carried out a detailed experimental investigation of the static properties of planar Josephson tunnel junctions in presence of a uniform external magnetic field applied in an arbitrary orientation with respect to the barrier plane. We considered annular junctions, as well as rectangular junctions (having both overlap and cross-type geometries) with different barrier aspect ratios. It is shown how most of the experimental findings in an oblique field can be reproduced invoking the superposition principle to combine the classical behavior of electrically small junctions in an in-plane field together with the small junction behavior in a transverse field that we recently published [R. Monaco et al., J. Appl. Phys. vol 104, 023906 (2008)]. We explore the implications of these results in supposing systematic errors in previous experiments and in proposing new possible applications. We show that the presence of a transverse field may have important consequences, which could be either voluntarily exploited in applications or present an unwanted perturbation.

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