Kondo-lattice screening in a d-wave superconductor

Abstract

We show that local moment screening in a Kondo lattice with d-wave superconducting conduction electrons is qualitatively different from the corresponding single Kondo impurity case. Despite the conduction-electron pseudogap, Kondo-lattice screening is stable if the gap amplitude obeys $Δ<\sqrt{\tk D}$, in contrast to the single impurity condition $Δ<\tk$ (where $\tk$ is the Kondo temperature for $\Delta =0$ and D is the bandwidth). Our theory explains the heavy electron behavior in the d-wave superconductor Nd_{2-x}Ce_{x}CuO_{4}.

11 pages, 6 figures, revised version to appear in Physical Review B

References in corpus (2)

• Phase transitions in the pseudogap Anderson and Kondo models: Critical dimensions, renormalization group, and local-moment criticality
• Upper-critical dimension in a quantum impurity model: Critical theory of the asymmetric pseudogap Kondo problem

Cited by in corpus (1)

• Multiple temperature scales of the periodic Anderson model: the slave bosons approach