Break junctions of the heavy-fermion superconductors

Details Break junctions of the heavy-fermion superconductors Break junctions of the heavy-fermion superconductors

1996-12-03

arxiv.org/abs/cond-mat/9612039v1

Physica B,230-232, 391, (1997)

Physics

Condensed Matter

Superconductivity

5 pages, EPS figures included, REVTeX, to be published in Physica B 97

Scientific paper

10.1016/S0921-4526(96)00731-4

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.

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