The physical properties of the unconventional PuCoGa5 superconductor are analysed in the framework of the d-wave Eliashberg theory, assuming phonon-mediated Cooper pairing. The solutions of the Eliashberg equations in the imaginary axis representation provide a time variation of the critical temperature inagreement with experimental findings collected over a time period of almost five years.
The real-axis formulation has then been used to calculate the temperature dependence of a number of observables (quasiparticle density of states, local spin susceptibility, spin¿lattice relaxation rate), which compare very favourably with experiments. The normal state resistivity can also be reproduced within a two-band model up to room temperature. Finally, the energy dependence of the Cooper-pair
quasi particle density of state at T ¼ 4 K is calculated for several values of the impurity scattering rate.
UMMARINO G. A.;
MAGNANI Nicola;
COLINEAU Eric;
GRIVEAU Jean-Christophe;
JUTIER F.;
REBIZANT J.;
WASTIN Franck;
CACIUFFO Roberto;
2009-10-02
ELSEVIER SCIENCE BV
JRC54527
0921-4526,
www.elsevier.com/locate/physb,
https://publications.jrc.ec.europa.eu/repository/handle/JRC54527,
10.1016/j.physb.2009.07.161,
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