Superconductivity, magnetism, and stoichiometry of single crystals of Fe1+y(Te1−xSx)z
Rongwei Hu, Emil S. Bozin, J. B. Warren, C. Petrovic
DOI 10.1103/PhysRevB.80.214514 · Physical Review B
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Abstract
We report synthesis of high-quality Fe1+y(Te1−xSx)z single crystals and a comprehensive study of structural, magnetic, and transport properties. We demonstrate the very small upper critical field anisotropy of Fe1+y(Te1−xSx)z, γH=Hc2∥c/Hc2⊥c. The value of γH reaches 1.05 at T=0.65TC for Fe1.12Te0.83S0.11 while still maintaining large values of upper critical field. 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 achieved for x≥0.1.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LaFeAsO1-xFx Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26 | Pressure not reported | unknown |
| Fe1.12Te0.97S0.03 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.5 | Pressure not reported | onset |
| Fe1.13Te0.85S0.10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.5 | Pressure not reported | onset |
| Fe1.13Te0.85S0.10 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 2 | Pressure not reported | zero_resistance |
| Fe1.12Te0.83S0.11 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.6 | Pressure not reported | onset |
| Fe1.12Te0.83S0.11 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 3.5 | Pressure not reported | zero_resistance |
| Fe1.06Te0.88S0.14 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.7 | Pressure not reported | onset |
| Fe1.06Te0.88S0.14 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7 | Pressure not reported | zero_resistance |
| Fe0.98Te0.90S0.15 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8.8 | Pressure not reported | onset |
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