Theory of Superconductivity in PuCoGa5

Abstract

Recently, superconductivity in PuCoGa5 was discovered. It has the same crystal structure as CeMIn5(M=Ir, Co, Rh). The electron correlation in PuCoGa5 is estimated to be weak compared with CeMIn5, and the filling number of electrons is considered to be far from 0.5/spin in the band which plays an important role in realizing the superconductivity. Nevertheless, the superconducting transition temperature Tc in PuCoGa5 is almost by an order of magnitude higher than that in CeMIn5. In order to explain the superconductivity with high Tc, we adopt the periodic Anderson model and calculate Tc by solving the Dyson-Gor'kov equation derived by the third order perturbation theory with respect to U. By this calculation, we indicate that the superconducting state of PuCoGa5 is a d-wave pairing state, and show that the good location of two Fermi surfaces results in the high Tc in PuCoGa5.

12 pages, LaTex2e, to be published in J.Phys.Soc

References in corpus (4)

• Angular Position of Nodes in the Superconducting Gap of Quasi-2D Heavy-Fermion Superconductor CeCoIn_5
• A New Heavy-Fermion Superconductor CeIrIn5: Relative of the Cuprates?
• Electronic Structure and Fermiology of PuCoGa${}_5$
• Perturbation Theory on the Superconductivity of Heavy Fermion Superconductors CeIr_{x}Co_{1-x}In_5

Cited by in corpus (9)

• Magnetic state of plutonium ion in metallic Pu and its compounds
• Heavy electrons and the symplectic symmetry of spin
• Supplementary material to Heavy electrons and the symplectic symmetry of spin
• Strong-coupling d-wave superconductivity in PuCoGa_5 probed by point contact spectroscopy
• Orbital-Controlled Superconductivity in f-Electron Systems
• Local suppression of the superfluid density of PuCoGa${}_5$ in the Swiss Cheese model
• The symmetry of the superconducting order parameter in PuCoGa${}_5$
• Muon spin rotation measurements of the superfluid density in fresh and aged superconducting PuCoGa${}_5$
• Microscopic Properties of the Heavy-Fermion Superconductor PuCoIn${}_5$ Explored by Nuclear Quadrupole Resonance