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Superconducting fluctuations above T c in (Li1− x Fe x )OHFeSe single crystal
Superconductor Science and Technology ( IF 3.6 ) Pub Date : 2021-03-10 , DOI: 10.1088/1361-6668/abe7ae
Yuxian Wu 1, 2 , Zhiwei Wen 1, 2 , Yong Li 1, 2 , Yongliang Chen 2 , Yong Zhao 1, 2, 3
Affiliation  

The magnetization and resistivity measurements have been done to investigate the superconducting fluctuations effect above the superconducting transition temperature (T c) in (Li1−x Fe x )OHFeSe single crystal. These measurements were performed with applying the external magnetic fields in the ab plane of (Li1−x Fe x )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−x Fe x )OHFeSe is a large one. This exceeding value is obviously higher than the conventional superconductors. In addition, the superconductivity of (Li1−x Fe x )OHFeSe coexists with the magnetism rooted in the (Li, Fe)OH layer and induced by magnetic field at low temperature.



中文翻译:

(Li 1− x Fe x)OHFeSe单晶中高于T c的超导涨落

已经进行了磁化和电阻率测量,以研究(Li 1- x Fe x)OHFeSe单晶中超导转变温度(T c)以上的超导波动效应。这些测量是通过在(Li 1- x Fe x)OHFeSe单晶的ab平面中施加外部磁场来进行的。通过分析反磁响应和过剩电导率,研究了正常状态下超导波动的行为。确定超导波动的上限温度约为T c的1.2倍 ,表明(Li 1- x Fe x)OHFeSe的超导涨落很大。该超过值明显高于常规超导体。此外,(Li 1- x Fe x)OHFeSe的超导性与(Li,Fe)OH层中存在并在低温下由磁场感应的磁性共存。

更新日期:2021-03-10
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