Jul, 2015
Competing d-Wave and p-Wave Spin-Singlet Superconductivities in the Two-Dimensional Kondo Lattice
PHYSICAL REVIEW LETTERS
- Volume
- 115
- Number
- 3
- First page
- 036404-1
- Last page
- 036404-5
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1103/PhysRevLett.115.036404
- Publisher
- AMER PHYSICAL SOC
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.
- Link information
- ID information
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- DOI : 10.1103/PhysRevLett.115.036404
- ISSN : 0031-9007
- eISSN : 1079-7114
- Web of Science ID : WOS:000358024500006