Interplay of structure, magnetism, and superconductivity in Se substituted iron 
telluride with excess Fe

Cherian, Dona; Rößler, S.; Wirth, S.; Elizabeth, Suja

doi:10.1088/0953-8984/27/20/205702

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Interplay of structure, magnetism, and superconductivity in Se substituted iron telluride with excess Fe

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Rößler, S.
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Wirth, S.
Steffen Wirth, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Cherian, D., Rößler, S., Wirth, S., & Elizabeth, S. (2015). Interplay of structure, magnetism, and superconductivity in Se substituted iron telluride with excess Fe. Journal of Physics: Condensed Matter, 27(20): 205702, pp. 1-8. doi:10.1088/0953-8984/27/20/205702.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0027-7AA6-7

Abstract

We investigated the evolution of the temperature-composition phase diagram of Fe1+y Te upon Se substitution. In particular, the effect of Se substitution on the two-step, coupled magneto-structural transition in Fe1+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.