1. Interaction between mixed-valent rare-earth impurities in BCS superconductors
- Author
-
Ke-qi Luo, Chang-De Gong, and Jun Li
- Subjects
Physics ,Superconductivity ,Mixed valent ,Condensed matter physics ,Dopant ,Impurity ,Condensed Matter::Superconductivity ,Rare earth ,Condensed Matter::Strongly Correlated Electrons ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,Coupling (probability) - Abstract
The Goldstone-Feynman diagrammatic technique is adopted to study the interaction between mixed-valent rare-earth impurities in BCS superconductors. The influence of cerium-impurity coupling together with isolated cerium-impurity upon superconductivity of ${\mathrm{Th}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Ce}}_{\mathit{x}}$ system is worked out. In comparison with magnetic rare-earth impurities, depression of superconductivity due to impurity interaction of nonmagnetic mixed-valent rare-earth dopants is much smaller.
- Published
- 1994