We treat theoretically Shapiro steps in tunnel Josephson junctions with spatially alternating critical current density. Explicit analytical formulas for the width of the first integer (normal) and half-integer (anomalous) Shapiro steps are derived for short junctions. We develop coarse-graining approach, which describes Shapiro steps in the voltage-current curves of the asymmetric grain boundaries in YBCO thin films and different superconductor-ferromagnet-superconductor Josephson-type heterostructures.
@article{arxiv.0708.1222,
title = {Shapiro steps in Josephson junctions with alternating critical current density},
author = {M. Moshe and R. G. Mints},
journal= {arXiv preprint arXiv:0708.1222},
year = {2009}
}
Comments
5 pages, 3 figures, accepted for publication in Phys. Rev. B