All-MgB2 Josephson tunnel junctions
超导电性
2009-11-10 v1 材料科学
摘要
Sandwich-type all-MgB2 Josephson tunnel junctions (MgB2/AlOx/MgB2) have been fabricated for the first time with as-grown MgB2 films formed by molecular beam epitaxy. The junctions exhibit substantial superconducting current (IcRN product ~ 0.8 mV at 4.2K), a well-defined superconducting gap (delta = ~2.3 mV), and clear Fraunhofer patterns. The superconducting gap voltage of delta agrees well with the smaller gap in the multi-gap scenario. The results demonstrate that MgB2 has great promise for superconducting electronics that can be operated at T ~ 20 K.
引用
@article{arxiv.cond-mat/0412345,
title = {All-MgB2 Josephson tunnel junctions},
author = {K. Ueda and S. Saito and K. Semba and T. Makimoto and M. Naito},
journal= {arXiv preprint arXiv:cond-mat/0412345},
year = {2009}
}
备注
9 pages, 3 figures