Effect of doping on electrical, magnetic, and superconducting properties of KxFe2−yS2
Jiangang Guo, Xiaolong Chen, Gang Wang, Shifeng Jin, Tingting Zhou, Xiaofang Lai
DOI 10.1103/PhysRevB.85.054507 · Physical Review B
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Abstract
We report the results of electrical and magnetic properties on a series of KxFe2−yS2 (x = 1, 0.8, y = 0.1–0.5) single crystals. KFe1.5S2 exhibits a semiconductor electrical property and undergoes an antiferromagnetic transition at about 43 K. Superconductivity was not found by only varying iron concentrations. However, codoping with iron and selenium in KFe1.5S2 can successfully induce superconductivity at 26 K. The experimental data provide evidence that the chemical pressure and disorder scattering may be responsible for the emergence of superconductivity.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| FeSe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 8 | Pressure not reported | unknown |
| FeSe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 37 | Pressure not reported | unknown |
| KxFe2Se2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure unresolved | unknown |
| K0.8Fe1.7SSe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26.3 | Pressure not reported | onset |
| K0.8Fe1.7SSe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 24.6 | Pressure not reported | zero_resistance |
| K0.8Fe1.7SSe Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 24.5 | Pressure not reported | onset |
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