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

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 formation of heavy quasiparticles.

5 pages, 4 figures

References in corpus (13)

• Continuous-time Monte Carlo methods for quantum impurity models
• Dynamical vertex approximation - a step beyond dynamical mean field theory
• Dual fermion approach to the two-dimensional Hubbard model: Antiferromagnetic fluctuations and Fermi arcs
• Influence of Spatial Correlations in Strongly Correlated Electron Systems: Extension to Dynamical Mean Field Approximation
• Superconductivity, antiferromagnetism and phase separation in the two-dimensional Hubbard model: A dual-fermion approach
• Fermi Surface Reconstruction without Breakdown of Kondo Screening at Quantum Critical Point
• Continuous-Time Quantum Monte Carlo Method for the Coqblin-Schrieffer Model
• Evolution of a Large Fermi Surface in the Kondo Lattice
• Evolution of the Fermi Surface across a Magnetic Order-Disorder Transition in the Two-Dimensional Kondo Lattice Model: A Dynamical Cluster Approach
• Magnetic phases in the correlated Kondo-lattice model
• Unconventional Superconductivity from Local Spin Fluctuations in the Kondo Lattice
• The Kondo Lattice Model in Infinite Dimensions II. Static Susceptibilities and Phase Diagram
• Variational cluster approach to s-wave pairing in heavy-fermion superconductors

Cited by in corpus (4)

• Diagrammatic Monte Carlo for Dual Fermions
• Localized-to-itinerant transition preceding antiferromagnetic quantum critical point and gapless superconductivity in CeRh${}_{0.5}$Ir${}_{0.5}$In${}_5$
• Mixing of odd- and even-frequency pairings in strongly correlated electron systems under magnetic field
• Reentrant $s$-wave superconductivity in the periodic Anderson model with attractive conduction band Hubbard interaction