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Exotic pairing instability in the heavy-fermion superconductor CeCoIn5

A. Bussmann-Holder1, A. Simon1 and A. R. Bishop2

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Superconductivity in the heavy-fermion compound CeCoIn5 has recently been found to be due to multiple-band effects (Phys. Rev. Lett., 94 (2005) 107005) with a distinct two-gap structure. It is shown here that the enormously enhanced values of the gap ratios with respect to Tc have an unusual origin with the electron dynamics mainly governed by f-p hybridization.


PACS

74.20.-z Theories and models of superconducting state

74.20.Rp Pairing symmetries (other than s-wave)

74.70.Tx Heavy-fermion superconductors

Subjects

Superconductivity

Dates

Issue 2 (July 2006)

Received 10 January 2006, accepted for publication 29 May 2006, in final form 29 May 2006

Published 16 June 2006



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