Interplay of magnetism and superconductivity in the compressed Fe-ladder compound BaFe2Se3
Jianjun Ying, Hechang Lei, Cedomir Petrovic, Yuming Xiao, Viktor V. Struzhkin
DOI 10.1103/PhysRevB.95.241109 · Physical Review B
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Abstract
High pressure resistance, susceptibility, and Fe Kβ x-ray emission spectroscopy measurements were performed on Fe-ladder compound BaFe2Se3. Pressure-induced superconductivity was observed which is similar to the previously reported superconductivity in the BaFe2S3 samples. The slope of local magnetic moment versus pressure shows an anomaly across the insulator-metal transition pressure in the BaFe2Se3 samples. The local magnetic moment is continuously decreasing with increasing pressure, and the superconductivity appears only when the local magnetic moment value is comparable to the one in the iron-pnictide superconductors. Our results indicate that the compressed BaFe2Ch3 (Ch=S, Se) is a new family of iron-based superconductors. Despite the crystal structures completely different from the known iron-based superconducting materials, the magnetism in this Fe-ladder material plays a critical role in superconductivity. This behavior is similar to the other members of iron-based superconducting materials.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| BaFe2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11 | 10.2 GPa | onset |
| BaFe2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11 | 12.7 GPa | onset |
| BaFe2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11 | 13 GPa | onset |
| BaFe2Se3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11 | 13 GPa | onset |
| BaFe2S3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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