title: Interplay of structure, magnetism, and superconductivity in Se substituted iron telluride with excess Fe.
abstract: We investigated the evolution of the temperature-composition phase diagram of Fe(1+y)Te upon Se substitution. In particular, the effect of Se substitution on the two-step, coupled magneto-structural transition in Fe(1+y)Te single crystals is investigated. To this end, the nominal Fe excess was kept at y = 0.12. For low Se concentrations, the two magneto-structural transitions displayed a tendency to merge. In spite of the high Fe-content, superconductivity emerges for Se concentrations x ⩾ 0.1. We present a temperature-composition phase diagram to demonstrate the interplay of structure, magnetism and superconductivity in these ternary Fe-chalcogenides.
authors.affiliation: Department of Physics, Indian Institute of Science, C V Raman Ave, Bengaluru, Karnataka 560012, India.
authors.forename: Dona
authors.initials: D
authors.lastname: Cherian
authors.forename: S
authors.initials: S
authors.lastname: Rößler
authors.forename: S
authors.initials: S
authors.lastname: Wirth
authors.forename: Suja
authors.initials: S
authors.lastname: Elizabeth