Synthesis methods, basic physical properties, and potential applications of the FeSe superconductor

Xu, Han-Shu; Xie, Wen

doi:10.1016/j.ccr.2023.215591

Coordination Chemistry Reviews

2024

DOI: 10.1016/j.ccr.2023.215591

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Synthesis methods, basic physical properties, and potential applications of the FeSe superconductor

Han-Shu Xu,

Wen Xie

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2024

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Hydrothermal synthesis of tetragonal FeS: Dome-shaped superconductivity vs Fe:S actual molar ratios

Xie,

Zheng,

2024

Journal of Applied Physics

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We successfully synthesized tetragonal FeS with various Fe:S molar ratios using a hydrothermal method, and the EDS and XRF results confirmed that FeS exhibits superconductivity within the Fe and S element ratio range of 1.155–1.274, rather than a strict stoichiometric ratio. The reaction temperature can not only play a crucial role in determining the purity of the obtained FeS phase but also significantly alter its micromorphology. Significantly, by analyzing the relationship between the Fe:S actual molar ratio and Tc as well as the Fe:S actual molar ratio and unit cell volume, FeS exhibits dome-shaped superconductivity and shows a negative correlation with Tc and chemical pressure. Furthermore, considering the correlation between anion height (hanion) and Tc, Tc reaches the maximum value of 4.53 K for hanion ≈ 1.28 Å, a behavior distinct from that of observed in Fe-pnictide superconductors. In short, our experimental results provide a unique perspective to deepen our understanding of FeS superconductors.

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Hydrothermal synthesis of tetragonal FeS: Dome-shaped superconductivity vs Fe:S actual molar ratios

Xie,

Zheng,

2024

Journal of Applied Physics

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Synthesis methods, basic physical properties, and potential applications of the FeSe superconductor

Cited by 1 publication

References 232 publications

Hydrothermal synthesis of tetragonal FeS: Dome-shaped superconductivity vs Fe:S actual molar ratios

Hydrothermal synthesis of tetragonal FeS: Dome-shaped superconductivity vs Fe:S actual molar ratios

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