Magnetism, Superconductivity and Stoichiometry in Single Crystals of Fe1+y(Te1-xSx)z

Abstract

We report synthesis of high quality Fe1+y(Te1-xSx)z single crystals and a comprehensive study of structural, magnetic and transport properties. There is high sensitivity to material stoichiometry which includes vacancies on the Te(S) site. Our results reveal competition and coexistence of magnetic order and percolative superconductivity for x >= 0.03, while zero resistivity is acheived for x >= 0.1.

6 pages, 5 figures

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• Unified Picture for Magnetic Correlations in Iron-Based Superconductors
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• Pauli-limited upper critical field in Fe1+yTe1-xSex
• Interplay between magnetism and superconductivity in iron-chalcogenide superconductors: crystal growth and characterizations
• Temperature dependence of lower critical field Hc1(T) shows nodeless superconductivity in FeSe
• Physical properties of FeSe${}_{0.5}$Te${}_{0.5}$ single crystals grown under different conditions
• Critical fields, thermally-activated transport and critical current density of beta-FeSe single crystals
• Evidence of local structural inhomogeneity in FeSe(1-x)Te(x) from extended x-ray absorption fine structure
• Unconventional temperature enhanced magnetism in iron telluride
• Strong anisotropy in nearly ideal-tetrahedral superconducting FeS single crystals
• 57-Fe Mossbauer study of magnetic ordering in superconducting K_0.85Fe_1.83Se_2.09 single crystals
• London penetration depth and superfluid density in single crystals of Fe(Te,Se) and Fe(Te,S) superconductors
• Low-temperature phase diagram of Fe1+yTe
• Review of annealing effects and superconductivity in Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$ superconductors
• Thermally activated energy and flux flow Hall effect of Fe1+y(Te1-xSx)z
• Superconductivity, Antiferromagnetism, and Neutron Scattering
• Evolution of superconductivity by oxygen annealing in FeTe0.8S0.2
• First-order structural transition in the magnetically ordered phase of Fe1.13Te
• Continuous magnetic and structural phase transitions in Fe1+yTe
• Thin Film Growth and Device Fabrication of Iron-Based Superconductors
• Disappearance of static magnetic order and evolution of spin fluctuations in Fe${}_{1+\delta }$Se${}_x$Te${}_{1-x}$
• The magnetic and structural properties near the Lifshitz point in Fe1+xTe
• Pressure-induced phase transitions and high-pressure tetragonal phase of Fe1.08Te
• Superconductivity Induced in Iron Telluride Films by Low Temperature Oxygen Incorporation
• Effects of excess Fe on upper critical field and magnetotransport in Fe1+y(Te1-xSx)z
• Ferro-orbital ordering transition in iron telluride Fe${}_{1+y}$Te
• Improvement of superconducting properties of FeSe0.5Te0.5 single crystals by Mn substitution
• Superconductivity in oxygen-annealed FeTe1-xSx single crystal
• Spin liquid polymorphism in a correlated electron system on the threshold of superconductivity
• Growth, Characterization, Vortex Pinning and Vortex Flow Properties of Single Crystals of Iron Chalcogenide Superconductor FeCr${}_{0.02}$Se
• Quantitative characterization of short-range orthorhombic fluctuations in FeSe through pair distribution function analysis
• Spin fluctuations and superconductivity in powders of Fe_1+xTe_0.7Se_0.3 as a function of interstitial iron concentration
• Enhanced superconducting properties in FeCr${}_x$Se
• Anisotropic magnetism, resistivity, London penetration depth and magneto-optical imaging of superconducting K0.80Fe1.76Se2 single crystals
• Magnetism and superconductivity in Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$
• Common origin of the two types of magnetic fluctuations in iron chalcogenides
• Observation of non-Fermi liquid behavior in hole-doped LiFe${}_{1-x}$V${}_x$As
• Normal state charge dynamics of Fe1.06Te0.88S0.14 superconductor probed with infrared spectroscopy
• Single crystal growth and structural characterization of FeTe1-xSx
• Brief review on iron-based superconductors: are there clues for unconventional superconductivity?
• Pressure effect on superconductivity in FeSe0.5Te0.5
• Magnetic neutron scattering studies on the Fe-based superconductor system Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$
• "Forbidden" phonon: dynamical signature of bond symmetry breaking in the iron chalcogenides
• Polaronic transport and thermoelectricity in Fe${}_{1-x}$Co${}_x$Sb${}_2$S${}_4$ ($x$ = 0, 0.1, and 0.2)
• Size Dependence of Oxygen-annealing Effects on Superconductivity of Fe{1+y}Te{1-x}S{x}
• Spin-isotropic continuum of spin excitations in antiferromagnetically ordered Fe${}_{1.07}$Te
• Magnetism and Superconductivity of S-substituted FeTe
• Electronic structure of ruthenium-doped iron chalcogenides
• Anisotropic pressure effects on superconductivity in Fe1+yTe1-xSx
• Synthesis and physical properties of the new potassium iron selenide superconductor K0.80Fe1.76Se2