Andreev reflection at point contacts with heavy-fermion UBe13 ?

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Andreev reflection at point contacts with heavy-fermion UBe13 ?

subject

Superconductivity (cond-mat.supr-con)Condensed Matter - Strongly Correlated Electrons Strongly Correlated Electrons (cond-mat.str-el)Condensed Matter - Superconductivity Condensed Matter::Superconductivity FOS: Physical sciences

description

We comment on a recent Letter by Waelti et al. (PRL 84, 5616 (2000)) on 'Spectroscopic evidence for unconventional superconductivity in UBe13'. We show - by using the basic Wexler formula - that it is unlikely to observe Andreev reflection at point contacts between UBe13 and a normal metal. The large superconducting anomalies usually found for those contacts are mainly due to the resistive Maxwell resistance vanishing below Tc of UBe13.

year	journal	country	edition	language
2000-07-01

https://dx.doi.org/10.48550/arxiv.cond-mat/0007006

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