Eliashberg theory of superconductivity and inelastic rare-earth impurity scattering in filled skutterudite La$_{1-x}$Pr$_{x}$Os$_{4}$Sb$_{12}$

Jun Chang; Ilya Eremin; Peter Thalmeier; Peter Fulde

doi:10.1103/PhysRevB.76.220510

paper

Eliashberg theory of superconductivity and inelastic rare-earth impurity scattering in filled skutterudite La $_{1 - x}$ Pr $_{x}$ Os $_{4}$ Sb $_{12}$

arXiv:0709.3849 · doi:10.1103/PhysRevB.76.220510

Abstract

We study the influence of inelastic rare-earth impurity scattering on electron-phonon mediated superconductivity and mass renormalization in (La $_{1 - x}$ Pr $_{x}$ )Os $_{4}$ Sb $_{12}$ compounds. Solving the strong coupling Eliashberg equations we find that the dominant quadrupolar component of the inelastic scattering on Pr impurities yields an enhancement of the superconducting transition temperature T $_{c}$ in LaOs $_{4}$ Sb $_{12}$ and increases monotonically as a function of Pr concentration. The calculated results are in good agreement with the experimentally observed T $_{c} (x)$ dependence. Our analysis suggests that phonons and quadrupolar excitations cause the attractive electron interaction which results in the formation of Cooper pairs and singlet superconductivity in PrOs $_{4}$ Sb $_{12}$ .

5 pages,4 figures, revised title suggested by editor, original fig.4 and fig.5 combined together, discussion added before conclusion

References in corpus (1)

Direct Observation of Quadrupolar Excitons in the Heavy-Fermion Superconductor PrOs $_{4}$ Sb $_{12}$

Eliashberg theory of superconductivity and inelastic rare-earth impurity scattering in filled skutterudite La1−x​Prx​Os4​Sb12​

Abstract

References in corpus (1)

Cited by in corpus (4)

Eliashberg theory of superconductivity and inelastic rare-earth impurity scattering in filled skutterudite La $_{1 - x}$ Pr $_{x}$ Os $_{4}$ Sb $_{12}$