Synthesis and superconductivity of high-quality FeSe0.98 single crystals

被引：0

作者：

机构：

[1] [1,Wen, Zhiwei

[2] 1,Jia, Tao

[3] 1,Xiao, Yusen

[4] Li, Yong

[5] Cui, Yajing

[6] Li, Shulong

[7] 1,4,5,Zhao, Yong

[8] 1,Chen, Yongliang

来源：

Chen, Yongliang (llchen@home.swjtu.edu.cn); Zhao, Yong (zhaoyong@fjnu.edu.cn) | 2025年 / 160卷

基金：

中国国家自然科学基金;

关键词：

Critical current density (superconductivity) - Iron-based Superconductors - Magnetic variables measurement - Semiconducting selenium compounds - Strain measurement - Superconducting transition temperature;

D O I：

10.1016/j.solidstatesciences.2024.107801

中图分类号：

学科分类号：

摘要：

In this paper, high quality tetragonal phase FeSe0.98 single crystals of 2 × 5 × 0.2 mm3 are synthesized using chemical vapor transport method with seed crystals. Magnetic measurements indicated that the obtained FeSe0.98 single crystals have a sharp superconducting transition at 9 K. The magnetic hysteresis loops are symmetric, without second peak effect. The critical current density is 2.4 × 104 A/cm2. The resistivity measurements revealed the presence of an electronic nematic order transition associated with the structural transition at 88 K. This transition is robust to magnetic fields. The limit temperature of superconducting fluctuation (T ∗) is determined to be around 2.15 times larger than Tc, suggesting that the superconducting fluctuation of FeSe is a large one. The in-plane coherence length is 4.97 nm. © 2024 Elsevier Masson SAS

引用

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