Mechanical-controllable break junctions of the heavy-fermion superconductors can show Josephson-like superconducting anomalies. But a systematic study on the contact size demonstrates that these anomalies are mainly due to Maxwell's resistance being suppressed in the superconducting heavy-fermion phase. Up to day, we could not find any superconducting features by vacuum-tunnelling spectroscopy, providing further evidence for the pair-breaking effect of the heavy-fermion interfaces.
@article{arxiv.cond-mat/9612039,
title = {Break junctions of the heavy-fermion superconductors},
author = {K. Gloos and F. B. Anders and B. Buschinger and C. Geibel},
journal= {arXiv preprint arXiv:cond-mat/9612039},
year = {2016}
}
Comments
5 pages, EPS figures included, REVTeX, to be published in Physica B 97