Role of spin exchange on the coexistence of superconductivity and itinerant ferromagnetism in a two carrier model

In the present study, we examine the competition and coexistence of singlet superconductivity and itinerant ferromagnetism for a system in which the two orders are confined in spatial separated layers, by focusing on the effect of the spin exchange interaction between the two electronic subsystems. Within a mean-field approximation, the ground state phase diagram is derived and the role of the spin exchange between the two subsystems is discussed. (c) 2006 Elsevier B.V. All rights reserved.