Electronic structure of Ba(Fe,Ru)2As2 and Sr(Fe,Ir)2As2 alloys

Abstract

The electronic structures of Ba(Fe,Ru)${}_2$As${}_2$ and Sr(Fe,Ir)${}_2$As${}_2$ are investigated using density functional calculations. We find that these systems behave as coherent alloys from the electronic structure point of view. In particular, the isoelectronic substitution of Fe by Ru does not provide doping, but rather suppresses the spin density wave characteristic of the pure Fe compound by a reduction in the Stoner enhancement and an increase in the band width due hybridization involving Ru. The electronic structure near the Fermi level otherwise remains quite similar to that of BaFe${}_2$As${}_2$. The behavior of the Ir alloy is similar, except that in this case there is additional electron doping.

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Cited by in corpus (8)

• On the multi-orbital band structure and itinerant magnetism of iron-based superconductors
• Hole and Electron Contributions to the Transport Properties of Ba(Fe_(1-x)Ru_x)_2As_2 Single Crystals
• Effects of Ru Substitution on Dimensionality and Electron Correlations in Ba(Fe_{1-x}Ru_x)_2As_2
• Magnetic ground state of superconducting Eu(Fe0.88Ir0.12)2As2: A combined neutron diffraction and first-principles calculation study
• Microscopic coexistence of superconductivity and antiferromagnetism in underdoped Ba(Fe1-xRux)2As2
• Origin of structural and magnetic transitions in BaFe${}_{2-x}$Ru${}_x$As${}_2$ materials
• Electronic origin of structural transition in 122 Fe based superconductors
• Superconductivity on the verge of electronic topological transition in Fe based superconductors