Characteristics of CeCoIn5/Al/AlOx/Nb and CeCoIn5/Al/AlOx/Al tunnel junctions

Authors

Ivan Nevirkovets, University of WollongongFollow
O Chernyashevskyy, Northwestern University, USA
C Petrovic, Brookhaven National Laboratory, Upton, USA
Rongwei Hu, Brookhaven National Laboratory, Upton, USA
J B. Ketterson, Northwestern University, USA
Bimal K. Sarma, University of Wisconsin, USA

RIS ID

31358

Publication Details

Nevirkovets, IP, Chernyashevskyy, O, Petrovic, C, Hu, R, Ketterson, JB & Sarma, BK (2009), Characteristics of CeCoIn5/Al/AlOx/Nb and CeCoIn5/Al/AlOx/Al tunnel junctions, Physica C: Superconductivity and its Applications, 469(7-8), pp. 293-296.

Abstract

We report characteristics of CeCoIn₅/Al/AlO_x/Nb and CeCoIn₅/Al/AlO_x/Al tunnel junctions fabricated on the (0 0 1) surface of CeCoIn₅ crystal platelets. The main result of this work is the observation of a low Josephson current (as compared with that expected from the Ambegaokar–Baratoff formula), which is consistent with idea that the order parameter in the heavy-fermion superconductor CeCoIn₅ has unconventional pairing symmetry.