Abstract:
In this work theoretical investigation on the coexistence of superconductivity and
spin density wave in PrOl-X Fx FeAs has been made. By developing the model
Hamiltontan for the system and using the double time temperature-dependent Green's
function formalism,
we obtain expressions for superconducting transition temperature
(T
c
)
and spin density wave temperature (T
superconducting ordering (6.
sdw
) as a function of spin density wave and
sdw
,sc) parameters respectively.
The SDW order parameter suppresses the superconducting transition tempera
tures and it enhances the SDW ordering temperatures and vice versa. Evcnthough
the two states suppresses one another, the phase diagram that we obtaind shows that,
superconductivity and spin density wave coexist in a narrow region at low temprature
in P,,.OlrFrFeAs. Thus, our finding is in agreement with the experimcntal obs('['vation.
keywords: Superconductivity, SD\i\l, Coexistance, Critical temprature
