Three Dimensional Superconductivity in FeSe with Tczero Up to 10.9 K Induced by Internal Strain

Abstract

Polycrystalline sample FeSe was synthesized by a self-flux solution method which shows a zero resistance temperature up to 10.9 K and a Tconset (90% \rhon, \rhon: normal state resistivity) up to 13.3 K. The decrease of superconducting transition temperature by heat treatment indicates that internal crystallographic strain which plays the same effect as external pressure is the origin of its high Tc. The fluctuation conductivity was studied which could be well described by 3D Aslamazov-Larkin (AL) power law. The estimated value of coherence length \xic=9.2 Åis larger than the distance between conducting layers (~6.0 Å), indicating the three-dimensional nature of superconductivity in this compound.

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References in corpus (22)

• Superconductivity at 36 K in beta-Fe1.01Se with the compression of the interlayer separation under pressure
• Spin density wave anomaly at 140 K in the ternary iron arsenide BaFe2As2
• The superconductivity at 18 K in LiFeAs system
• Structural and magnetic phase diagram of CeFeAsO1-xFx and its relationship to high-temperature superconductivity
• Superconductivity at 27 K in tetragonal FeSe under high pressure
• Extreme Sensitivity of Superconductivity to Stoichiometry in FeSe (Fe1+dSe)
• Superconductivity close to magnetic instability in Fe(Se1-xTex)0.82
• Very High Field Two-Band Superconductivity in LaFeAsO_0.89F_0.11
• The Structural Phase Transition in FeSe (Fe1+dSe)
• Bulk Superconductivity at 14 K in Single Crystals of Fe1+yTexSe1-x
• Substitution Effects on FeSe Superconductor
• Crystal structure of the new FeSe1-x superconductor
• Superconductivity at 17 K in (Fe2P2)(Sr4Sc2O6): a new superconducting layered pnictide oxide with a thick perovskite oxide layer
• Superconductivity at T_c ~ 14 K in Single Crystalline FeTe${}_{0.61}$Se${}_{0.39}$
• Superconducting and ferromagnetic phases induced by lattice distortions in SrFe2As2
• Growth and Superconductivity of FeSex Crystals
• Upper critical fields of the 11-system iron-chalcogenide superconductor FeSe${}_{0.25}$Te${}_{0.75}$
• Upper critical field and fluctuation conductivity in the critical regime of doped SmFeAsO
• The pseudogap behavior in the stoichiometric FeSe superconductor (Tc~9.4 K)
• Theory of fluctuation conductivity from interband pairing in pnictide superconductors
• Superconducting FeSe1-xTex Single Crystals Grown by Optical Zone-Melting Technique
• Synthesis, crystal growth and superconducting properties of Fe-Se system

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• Enhanced critical temperature, pairing fluctuation effects, and BCS-BEC crossover in a two-band Fermi gas
• Enhanced superconducting properties in FeCr${}_x$Se
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• Evolution of tetragonal phase in the FeSe wire fabricated by a novel chemical-transformation PIT process