Dynamics of Semifluxons in Nb Long Josephson0−πJunctions

2003/11/26 by E. Goldobin, A. Sterck, T. Gaber +2 · 9 citations
Engineering · Physics and Astronomy · #Physics of Superconductivity and Magnetism #Power System Optimization and Stability #Quantum and electron transport phenomena #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.92.057005

published as Phys. Rev. Lett. 92, 057005 (2004) · Fractional vortices in conventional superconductors ;-)

arxiv created 2003/11/26 · openalex publication_date 2004/02/06 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We propose, implement, and test experimentally long Josephson 0\mathrm\text\ensuremath-\ensuremathπ junctions fabricated using conventional Nb\mathrm\text\ensuremath-AlO_x\mathrm\text\ensuremath-Nb technology. We show that by using a pair of current injectors one can create an arbitrary discontinuity of the Josephson phase and, in particular, a \ensuremathπ discontinuity, just as in d-wave/s-wave or in d-wave/d-wave junctions, and study fractional Josephson vortices which spontaneously appear. Moreover, using such junctions, we can investigate the dynamics of the fractional vortices---a domain which is not yet available for natural 0\mathrm\text\ensuremath-\ensuremathπ junctions due to their inherently high damping. We observe half-integer zero-field steps which appear on the current-voltage characteristics due to the hopping of semifluxons.

Cited by

• Nonideal artificial phase discontinuity in long Josephson0−κjunctions
• Ground states of one and two fractional vortices in long Josephson0−κjunctions
• Quantum tunneling of semifluxons in a0−π−0long Josephson junction
• Oscillatory eigenmodes and stability of one and two arbitrary fractional vortices in long Josephson0−κjunctions
• Controllable plasma energy bands in a one-dimensional crystal of fractional Josephson vortices
• 0−πJosephson Tunnel Junctions with Ferromagnetic Barrier
• Spectroscopy of the Fractional Vortex Eigenfrequency in a Long Josephson0−κJunction
• Dynamics of point Josephson junctions in a microstrip line
• Low- T c Josephson junctions with tailored barrier

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