d-wave superconductivity in the frustrated two-dimensional periodic Anderson model

Abstract

Superconductivity in heavy-fermion materials can sometimes appear in the incoherent regime and in proximity to an antiferromagnetic quantum critical point. Here we study these phenomena using large scale determinant quantum Monte Carlo simulations and the dynamical cluster approximation with various impurity solvers for the periodic Anderson model with frustrated hybridization. We obtain solid evidence for a $d_{x^2-y^2}$ superconducting phase arising from an incoherent normal state in the vicinity of an antiferromagnetic quantum critical point. There is a coexistence region and the width of the superconducting dome increases with frustration. Through a study of the pairing dynamics we find that the retarded spin-fluctuations give the main contribution to the pairing glue. These results are relevant for unconventional superconductivity in the Ce-$115$ family of heavy-fermions.

9 pages, 7 figures. Text revised

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• Influence of the symmetry of the hybridization on the critical temperature of multi-band superconductors
• Reentrant $s$-wave superconductivity in the periodic Anderson model with attractive conduction band Hubbard interaction
• Tunable magnetism of a hexagonal Anderson droplet on the triangular lattice
• Evolution of the Andreev bands in the half-filled superconducting periodic Anderson model