Bulk Superconductivity in Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$ Induced by Annealing in Se and S Vapor

Abstract

We reported that bulk superconductivity in Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$ can be induced by annealing in Se and S vapor. The well-annealed samples show a large critical current density, emph{J}${}_c$ $\sim$ 2 - 4 $\times$ 10${}^5$ A/cm${}^2$. Combined with our previous reports about O${}_2$ and Te annealing effects, we proved that bulk superconductivity can be successfully induced in Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$ by annealing in atmosphere of all chalcogens, such as O, S, Se and Te.

2 pages, 3 figures

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Cited by in corpus (8)

• Dynamics and mechanism of oxygen annealing in Fe${}_{1+y}$Te${}_{0.6}$Se${}_{0.4}$ single crystal
• Multiband Effect and Possible Dirac Fermions in Fe${}_{1+y}$Te${}_{0.6}$Se${}_{0.4}$
• Bulk Superconductivity in Fe1+yTe0.6Se0.4 Induced by Removal of Excess Fe
• Comparative study of superconducting and normal-state anisotropy in Fe${}_{1+y}$Te${}_{0.6}$Se${}_{0.4}$ superconductors with controlled amounts of interstitial excess Fe
• On the role of chalcogen vapor annealing in inducing bulk superconductivity in Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$
• Coexistence of superconductivity and short-range double-stripe spin correlations in Te-vapor annealed FeTe${}_{1-x}$Se${}_x$ with $x\le 0.2$
• Deviation from canonical collective creep behavior in Li${}_{0.8}$Fe${}_{0.2}$OHFeSe
• Effects of Iodine Annealing on Fe1+yTe0.6Se0.4