Fractional Josephson vortices at YBa$_2$Cu$_3$O$_{7-x}$ grain boundaries

R. G. Mints; Ilya Papiashvili

Fractional Josephson vortices at YBa$_2$Cu$_3$O$_{7-x}$ grain boundaries

Superconductivity 2007-05-23 v1

Authors: R. G. Mints , Ilya Papiashvili

Abstract

We report numerical simulations of magnetic flux patterns in asymmetric 45 $^{\circ}$ [001]-tilt grain boundaries in YBa $_2$ Cu $_3$ O $_{7-x}$ superconducting films. The grain boundaries are treated as Josephson junctions with the critical current density $j_c(x)$ alternating along the junctions. We demonstrate the existence of Josephson vortices with fractional flux quanta for both periodic and random $j_c(x)$ . A method is proposed to extract fractional vortices from experimental flux patterns.

Keywords

Josephson vortices fractional flux quanta grain boundaries YBa$_2$Cu$_3$O$_{7-x}$ magnetic flux patterns

Cite

@article{arxiv.cond-mat/0101085,
  title  = {Fractional Josephson vortices at YBa$_2$Cu$_3$O$_{7-x}$ grain boundaries},
  author = {R. G. Mints and Ilya Papiashvili},
  journal= {arXiv preprint arXiv:cond-mat/0101085},
  year   = {2007}
}

Comments

4 pages, 4 figures, ReVTeX, submitted to PRL

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