What controls the phase diagram and superconductivity in Ru substituted BaFe$_2$As$_2$?

Details What controls the phase diagram and superconductivity in Ru substituted BaFe$_2$As$_2$? What controls the phase diagram and superconductivity in Ru substituted BaFe$_2$As$_2$?

2011-08-02

arxiv.org/abs/1108.0711v2

Phys. Rev. Lett. 107, 267002 (2011)

Physics

Condensed Matter

Superconductivity

5 pages, 5 figures, accepted for publication in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.107.267002

We use high resolution angle-resolved photoemission to study the electronic structure of the iron based high-temperature superconductors Ba(Fe$_{1-x}$Ru$_x$)$_2$As$_2$ as a function of Ru concentration. We find that substitution of Ru for Fe is isoelectronic, i. e., it does not change the value of the chemical potential. More interestingly, there are no measured, significant changes in the shape of the Fermi surface or in the Fermi velocity over a wide range of substitution levels ($0

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