Spin glass behavior of insulating K0.8Fe2-xS2

Abstract

We report the discovery of KxFe2-yS2 single crystals, isostructural to KxFe2-ySe2 superconductors. The sulfide compound is a small gap semiconductor and shows spin-glass behavior below 32 K. Our results indicate that stoichiometry, defects, and the local environment of FeCh (Ch = S,Se) tetrahedra have important effects on the physical properties of isostructural and isoelectronic KxFe2-yCh2 compounds.

4 pages, 4 figures

References in corpus (12)

• 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
• Density functional study of FeS, FeSe and FeTe: Electronic structure, magnetism, phonons and superconductivity
• Superconductivity at 27 K in tetragonal FeSe under high pressure
• Anion height dependence of Tc for the Fe-based superconductor
• Fe-based high temperature superconductivity with Tc=31K bordering an insulating antiferromagnet in (Tl,K)FexSe2 Crystals
• Superconductivity at 32 K in single crystal Rb${}_{0.78}$Fe${}_2$Se${}_{1.78}$}
• Synthesis and crystal growth of Cs0.8(FeSe0.98)2: a new iron-based superconductor with Tc=27K
• The effect of varying Fe-content on transport properties of K intercalated iron selenide KxFe2-ySe2
• Single Crystal Growth and Characterization of the Iron-Based Superconductor KFe2As2 Synthesized by KAs Flux Method
• Electronic Collective Modes and Superconductivity in Layered Conductors

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• Strong anisotropy in nearly ideal-tetrahedral superconducting FeS single crystals
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• Superconductivity in the iron selenide KxFe2Se2 (0 <= x <= 1)
• New ternary ThCr2Si2-type iron-selenide superconducting materials: synthesis, properties and simulations
• The intercalation chemistry of layered iron chalcogenide superconductors
• Superconductivity and magnetism in Iron Sulfides Intercalated by Metal Hydroxides
• Antiferromagnetism in semiconducting KFe0.85Ag1.15Te2 single crystals
• Critical current density and vortex pinning in tetragonal FeS${}_{1-x}$Se${}_x$ ($x=0,0.06$)
• Two spatially separated phases in semiconducting Rb${}_{0.8}$Fe${}_{1.5}$S${}_2$
• Evolution of correlation strength in KxFe(2-y)Se2 superconductor doped with S
• Physical properties of $A_x$Fe${}_{2-y}$S${}_2$ ($A$=K, Rb and Cs) single crystals
• Magnetism of the Fe${}^{2+}$ and Ce${}^{3+}$ sublattices in Ce${}_2$O${}_2$FeSe${}_2$: a combined neutron powder diffraction, inelastic neutron scattering and density functional study
• Coexistence of superconductivity and magnetism in K0.8Fe2Se1.4S0.4
• Electronic and Magnetic Structures of Chain Structured Iron Selenide Compounds
• Upper critical fields and superconducting anisotropy of K0.70Fe1.55Se1.01S0.99 and K0.76Fe1.61Se0.96S1.04 single crystals
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• Spin glass in semiconducting KFe${}_{1.05}$Ag${}_{0.88}$Te${}_2$ single crystals
• Sustained phase separation and spin glass in Co-doped K${}_x$Fe${}_{2-y}$Se${}_2$ single crystals
• NMR Characterization of Sulphur Substitution Effects in the K(x)Fe(2-y)Se(2-z)S(z) high Tc Superconductor
• Observation of two distinct superconducting domes under pressure in tetragonal FeS
• High-entropy magnetism of murunskite