Search for superconducting energy gap in UPt3 by point-contact spectroscopy

Jun Gouchi, Akihiko Sumiyama, Akira Yamaguchi, Gaku Motoyama, Noriaki Kimura, Etsuji Yamamoto, Yoshinori Haga, Yoshichika O'Nuki

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)


We have investigated the differential resistance of the point contacts between heavy-fermion superconductor UPt3 and a normal metal Pt, which were fabricated using a commercial piezo-electric actuator, and retried the observation of the energy gap of UPt3. A V-shaped dip is observed in both normal and superconducting states and disappeared around TK ∼ 20 K, suggesting that it is related to the Kondo effect. Below the superconducting transition temperature, a shallow double-minimum structure, which indicates the energy gap, has been observed for the contacts on the faces perpendicular to the a-, b- and c-axes of UPt3.

Original languageEnglish
Article number012066
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2014
Event2014 International Conference on Strongly Correlated Electron Systems, SCES 2014 - Grenoble, France
Duration: 2014 Jul 72014 Jul 14


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