Phase separation and superconductivity in Fe(1+x)Te(0.5)Se(0.5) |
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Authors: | Bhatia Vikas Rodriguez Efrain E Butch Nicholas P Paglione Johnpierre Green Mark A |
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Institution: | Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA. |
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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 or microstrain. |
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