A possible spin-fluctuation mechanism in the emergence of superconductivity in a region of magnetic instability, using the example of PuCoGa5

Abstract

The spin-fluctuation superconductivity mechanism of strongly correlated d-f electrons is considered within the Hubbard model. It is shown that the emergence of superconductivity is possible under conditions of strong spin anharmonicity. Evaluations of the superconductivity temperature in the model developed for the electron structure of PuCoGa5 agree with the experimental data. © 2013 Allerton Press, Inc.