Reduced leakage current in Josephson tunnel junctions with codeposited barriers

Superelliptic Josephson Tunnel Junctions

The most important practical characteristic of a Josephson junction is its critical current. The shape of the junction determines the specific form of the magnetic-field dependence of the its Josephson current. Here we address the magnetic diffraction patterns of specially shaped planar Josephson tunnel junctions. We focus on a wide ensemble of generalized ellipses, called superellipses, which ...

Magnetic tunnel junctions with MgO-EuO composite tunnel barriers

Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. The chalcogenide compound EuO is best known as a highly efficient spin-filter tunnel barrier material. Using the mo...

Josephson junctions with tunable current-phase relation

A. Lipman,1 R. G. Mints,1 R. Kleiner,2 D. Koelle,2 and E. Goldobin2,* 1The Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel 2Physikalisches Institut and Center for Collective Quantum Phenomena in LISA+, Universität Tübingen, Auf der Morgenstelle 14, D-72076 Tübingen, Germany (Received 29 September 2014; revised manuscript received 22 Octob...

Long Josephson tunnel junctions with doubly connected electrodes

Current-voltage characteristics of tunnel Josephson junctions with a ferromagnetic interlayer

A. S. Vasenko,1,2,3 S. Kawabata,4 A. A. Golubov,5 M. Yu. Kupriyanov,6 C. Lacroix,7 F. S. Bergeret,3,8 and F. W. J. Hekking2 1Institut Laue-Langevin, 6 rue Jules Horowitz, BP 156, F-38042 Grenoble, France 2LPMMC, Université Joseph Fourier and CNRS, 25 avenue des Martyrs, BP 166, F-38042 Grenoble, France 3Donostia International Physics Center (DIPC), Manuel de Lardizabal 4, E-20018 San Sebastián,...