Phase separation and superconductivity in Fe(1+x)Te(0.5)Se(0.5).

Abstract

Fe(1+x)Te(0.5)Se(0.5) is the archetypical iron-based superconductor. Here we show that the superconducting state is controlled by the stacking of its anti-PbO layers, such that homogeneous ordering hinders superconductivity and the highest volume fractions are observed in phase separated structures as evidenced by either a distribution of lattice parameters… (More)
DOI: 10.1039/c1cc13878b

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