Study of coexistence of Superconductivity and Antiferromagnetism in smaso1xfxfe
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Date
2011-06
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Addis Ababa University
Abstract
Superconductivity and magnetism were previously thought as incompatible until the discovery
of some rare earth ternary compounds that show the coexistence of superconductivity
and magnetism. In some of the recently discovered iron-based layered superconductors,
superconductivity and magnetism coexist. In the present work we examine the
possibility of coexistence of antiferromagnetism and superconductivity in samarium arsenide
oxide superconductor (SmAsO1xFxFe). Using a model of the Hamiltonian and
retarded double time Greens function formalism, we found expressions for superconducting
transition temperature (Tc), superconductivity order parameter ( sc(T)), AFM order
parameter ( ), and AFM transition temperature (Tm). We obtained the phase diagrams
(Tcvs ) and (Tmvs ) to obtain the region where both orders ,i.e, superconductivity and
AFM coexist. The region under the intersection of the two merged graphs shows that
superconductivity and AFM coexist in the system(SmAsO1xFxFe)
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Keywords
Superconductivity and magnetism