Year: 2008
Type: article
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 $\ensuremath{\Delta}<\sqrt{{T}_{K}D}$, in contrast to the single-impurity condition $\ensuremath{\Delta}<{T}_{K}$ (where ${T}_{K}$ is the Kondo temperature for $\ensuremath{\Delta}=0$ and $D$ is the bandwidth). Our theory explains the heavy electron behavior in the $d$-wave superconductor ${\mathrm{Nd}}_{2\ensuremath{-}x}{\mathrm{Ce}}_{x}\mathrm{Cu}{\mathrm{O}}_{4}$.
Source: Physical Review B
Authors: Daniel E. Sheehy, Jörg Schmalian
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2063214101