title: 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 or microstrain.
authors.affiliation: Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA.
authors.forename: Vikas
authors.initials: V
authors.lastname: Bhatia
authors.forename: Efrain E
authors.initials: EE
authors.lastname: Rodriguez
authors.forename: Nicholas P
authors.initials: NP
authors.lastname: Butch
authors.forename: Johnpierre
authors.initials: J
authors.lastname: Paglione
authors.forename: Mark A
authors.initials: MA
authors.lastname: Green