Evolution of superconductivity by oxygen annealing in FeTe0.8S0.2

Abstract

Oxygen annealing dramatically improved the superconducting properties of solid-state-reacted FeTe0.8S0.2, which showed only a broad onset of superconducting transition just after the synthesis. The zero resistivity appeared and reached 8.5 K by the oxygen annealing at 200\degree C. The superconducting volume fraction was also enhanced from 0 to almost 100%. The lattice constants were compressed by the oxygen annealing, indicating that the evolution of bulk superconductivity in FeTe0.8S0.2 was correlated to the shrinkage of lattice.

13 pages, 6 figures

References in corpus (9)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• Superconductivity at 36 K in beta-Fe1.01Se with the compression of the interlayer separation under pressure
• The superconductivity at 18 K in LiFeAs system
• Superconductivity at 27 K in tetragonal FeSe under high pressure
• Superconductivity close to magnetic instability in Fe(Se1-xTex)0.82
• Tellurium substitution effect on superconductivity of the alpha-phase Iron Selenide
• Substitution Effects on FeSe Superconductor
• Superconductivity in S-substituted FeTe
• Superconductivity at 17 K in (Fe2P2)(Sr4Sc2O6): a new superconducting layered pnictide oxide with a thick perovskite oxide layer

Cited by in corpus (17)

• A review of Fe-chalcogenide superconductors: the simplest Fe-based superconductor
• Dynamics and mechanism of oxygen annealing in Fe${}_{1+y}$Te${}_{0.6}$Se${}_{0.4}$ single crystal
• Physics and chemistry review of layered chalcogenide superconductors
• Annealing, acid, and alcoholic beverage effects on Fe1+yTe0.6Se0.4
• Intergrain effects in the AC susceptibility of polycrystalline LaFeAsO_{0.94}F_{0.06}: comparison with cuprate superconductors
• Superconductivity in oxygen-annealed FeTe1-xSx single crystal
• Inhomogeneous superconductivity induced by interstitial Fe deintercalation in oxidizing-agent-annealed and HNO3-treated Fe1+y(Te1-xSex)
• Clarification as to why alcoholic beverages have the ability to induce superconductivity in Fe_{1+d}Te_{1-x}S_x
• Superconductivity in PbO-type Fe chalcogenides
• Single crystal growth and structural characterization of FeTe1-xSx
• Bulk superconductivity in FeTe${}_{1-x}$Se${}_x$ via physicochemical pumping of excess iron
• Size Dependence of Oxygen-annealing Effects on Superconductivity of Fe{1+y}Te{1-x}S{x}
• A flat band at the chemical potential of a Fe1.03Te0.94S0.06 superconductor observed by angle-resolved photoemission spectroscopy
• Oxygen adsorption induced superconductivity in ultrathin FeTe film on SrTiO3(001)
• Superconductivity in FeTe0.8S0.2 induced by battery-like reaction
• Superconductivity in FeTe{1-x}S_x induced by electrochemical reaction using ionic liquid solution
• Removal of excess iron by annealing processes and emergence of bulk superconductivity in sulfur-substituted FeTe