Kondo-lattice screening in a d-wave superconductor

TitleKondo-lattice screening in a d-wave superconductor
Publication TypeJournal Article
Year of Publication2008
AuthorsSheehy DE, Schmalian J
Journal TitlePhysical Review B
Date PublishedMar
Type of ArticleArticle
ISBN Number1098-0121
Accession NumberISI:000254543000044
KeywordsANDERSON, behavior, excitations, GAPLESS FERMI SYSTEMS, HEAVY, liquid, MAGNETIC-IMPURITIES, model, ND2-XCEXCUO4-Y, phase-transitions

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 Delta < root TKD, in contrast to the singleimpurity condition Delta < T-K (where T-K is the Kondo temperature for Delta = 0 and D is the bandwidth). Our theory explains the heavy electron behavior in the d-wave superconductor Nd2-xCexCuO4.

Alternate JournalPhys. Rev. B