Superconducting fluctuations above Tc in (Li1-xFex)OHFeSe single crystal

被引：2
作者：
Wu, Yuxian [1 ,2 ,3 ]
Wen, Zhiwei [1 ,2 ,3 ]
Li, Yong [1 ,2 ,3 ]
Chen, Yongliang [2 ,3 ]
Zhao, Yong [1 ,2 ,3 ,4 ]
机构：
[1] Southwest Jiaotong Univ, Sch Phys Sci & Technol, Chengdu 610031, Peoples R China
[2] Southwest Jiaotong Univ, Superconduct & New Energy R&D Ctr, Chengdu 610031, Peoples R China
[3] Southwest Jiaotong Univ, Minist Educ, Key Lab Magnet Suspens Technol & Maglev Vehicle, Chengdu 610031, Peoples R China
[4] Fujian Normal Univ, Coll Phys & Energy, Fuzhou 350117, Peoples R China
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2021年 / 34卷 / 04期
基金：
高等学校博士学科点专项科研基金; 中国国家自然科学基金;
关键词：
(Li1-xFex)OHFeSe superconductor; superconducting fluctuation; diamagnetism response; MAGNETIC-PROPERTIES; PHASE-DIAGRAM; FIELD; TRANSPORT;
D O I：
10.1088/1361-6668/abe7ae
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The magnetization and resistivity measurements have been done to investigate the superconducting fluctuations effect above the superconducting transition temperature (T-c) in (Li1-xFex)OHFeSe single crystal. These measurements were performed with applying the external magnetic fields in the ab plane of (Li1-xFex)OHFeSe single crystal. By analyzing the diamagnetism response and excess conductivity, the behavior of superconducting fluctuations in the normal state is studied. The upper limit temperature of superconducting fluctuation is determined to be around 1.2 times larger than T-c, suggesting that the superconducting fluctuation of (Li1-xFex)OHFeSe is a large one. This exceeding value is obviously higher than the conventional superconductors. In addition, the superconductivity of (Li1-xFex)OHFeSe coexists with the magnetism rooted in the (Li, Fe)OH layer and induced by magnetic field at low temperature.
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页数：7
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