Planar Josephson Tunnel Junctions in an Asymmetric Magnetic Field

Details Planar Josephson Tunnel Junctions in an Asymmetric Magnetic Field Planar Josephson Tunnel Junctions in an Asymmetric Magnetic Field

2010-06-01

arxiv.org/abs/1006.0266v1

JOURNAL OF APPLIED PHYSICS Volume: 108 Issue: 3 Article Number: 033906, 2010

Physics

Condensed Matter

Superconductivity

9 pages, 3 figures

Scientific paper

10.1063/1.3467790

We analyze the consequences resulting from the asymmetric boundary conditions imposed by a non-uniform external magnetic field at the extremities of a planar Josephson tunnel junction and predict a number of testable signatures. When the junction length $L$ is smaller than its Josephson penetration depth $\lambda_j$, static analytical calculations lead to a Fresnel-like magnetic diffraction pattern, rather than a Fraunhofer-like one typical of a uniform field. Numerical simulations allow to investigate intermediate length ($L\approx \lambda_j$) and long ($L>\lambda_j$) junctions. We consider both uniform and $\delta$-shaped bias distributions. We also speculate on the possibility of exploiting the unique static properties of this system for basic experiments and devices.

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