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arxiv: cond-mat/0007006 · v1 · submitted 2000-07-01 · ❄️ cond-mat.str-el · cond-mat.supr-con

Andreev reflection at point contacts with heavy-fermion UBe13 ?

K. Gloos This is my paper
classification ❄️ cond-mat.str-el cond-mat.supr-con
keywords ube13contactsandreevpointreflectionanomaliesbasicbelow
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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.

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