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< TK D, in contrast to the single-impurity condition Δ< TK (where TK is the Kondo temperature for Δ=0 and D is the bandwidth). Our theory explains the heavy electron behavior in the d -wave superconductor Nd2-x Cex Cu O4. © 2008 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review B - Condensed Matter and Materials Physics
Sheehy, D., & Schmalian, J. (2008). Kondo-lattice screening in a d -wave superconductor. Physical Review B - Condensed Matter and Materials Physics, 77 (12) https://doi.org/10.1103/PhysRevB.77.125129