d-wave superconductive gap and related observables of PuCoGa5

Abstract The real-axis formulation of the Eliashberg theory has been applied to PuCoGa 5 , assuming d -wave symmetry and phonon-mediated pairing. Here, we present the calculated temperature dependence of the superconductive gap Δ ( T ) for a freshly prepared sample, and the variation of Δ ( T = 2 K) with increasing impurity scattering rate. We also present the calculated energy dependence of the quasiparticle density of state, together with the corresponding normalized tunnelling conductance at T = 4 K. These quantities could be compared with future tunnelling experiments that would also lead to a direct determination of the spectral density function. Finally, we show that the normal phase resistivity can be well reproduced up to room temperature assuming electron–phonon scattering within a two-band model.