Competing d-Wave and p-Wave Spin-Singlet Superconductivities in the Two-Dimensional Kondo Lattice

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19 Citations (Scopus)

Abstract

The Kondo lattice model describes a quantum phase transition between the antiferromagnetic state and heavy-fermion states. Applying the dual-fermion approach, we explore possible superconductivities emerging due to the critical antiferromagnetic fluctuations. The d-wave pairing is found to be the leading instability only in the weak-coupling regime. As the coupling is increased, we observe a change of the pairing symmetry into a p-wave spin-singlet pairing. The competing superconductivities are ascribed to crossover between small and large Fermi surfaces, which occurs with the formation of heavy quasiparticles.

Original languageEnglish
Article number036404
JournalPhysical Review Letters
Volume115
Issue number3
DOIs
Publication statusPublished - Jul 15 2015
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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