<strong>122</strong>体系铁基超导单晶的制备及其化学掺杂研究进展

doi:10.11901/1005.3093.2023.312

材料研究学报

2024, Vol. 38

Issue (5): 321-329 DOI: 10.11901/1005.3093.2023.312

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122体系铁基超导单晶的制备及其化学掺杂研究进展

余启航¹, 杨芳¹(

), 刘吉星², 贺一轩¹, 张胜楠², 闫果¹^,³, 张平祥¹^,²

^1.西北工业大学超导材料与应用技术研究院西安 710072
^2.西北有色金属研究院西安 710016
^3.西安聚能医工科技有限公司西安 710028

Research Progress on Fabrication and Chemical Doping of 122-type Iron-based Single Crystal Superconductors

YU Qihang¹, YANG Fang¹(

), LIU Jixing², HE Yixuan¹, ZHANG Shengnan², YAN Guo¹^,³, ZHANG Pingxiang¹^,²

^1.Institute of Superconducting Materials and Applied Technology, Northwestern Polytechnical University, Xi'an 710072, China
^2.Northwest Institute for Nonferrous Metal Research, Xi'an 710016, China
^3.Xi'an Juneng Medical Engineering Technologies Co., Ltd., Xi'an 710028, China

引用本文:

余启航, 杨芳, 刘吉星, 贺一轩, 张胜楠, 闫果, 张平祥. 122体系铁基超导单晶的制备及其化学掺杂研究进展[J]. 材料研究学报, 2024, 38(5): 321-329.
Qihang YU, Fang YANG, Jixing LIU, Yixuan HE, Shengnan ZHANG, Guo YAN, Pingxiang ZHANG. Research Progress on Fabrication and Chemical Doping of 122-type Iron-based Single Crystal Superconductors[J]. Chinese Journal of Materials Research, 2024, 38(5): 321-329.

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摘要:

制备铁基超导体122体系的高质量、大尺寸单晶较为容易，对于研究铁基超导机理有重要的意义。122铁砷超导体母相没有超导性，进行化学掺杂在体系中引入电子、空穴或加化学压力，可诱导出超导性。本文总结了助熔剂法、布里奇曼法和光学浮区法等几种122体系铁基超导单晶的制备方法，并介绍了相关方法和研究进展。本文还概述了电子掺杂、空穴掺杂、等价掺杂等几种122铁砷超导体的化学掺杂以及相关研究进展。

关键词 ：评述, 铁基超导体, 单晶, 制备方法, 化学掺杂

Abstract：

The discovery of iron-based superconductors has offered a new material family for exploring the mechanism of high-temperature superconductivity. 122-type iron-based superconductors has been widely studied by various researchers due to the easy fabrication for the parent compounds of 122-type iron arsenic matrix of high-quality single crystals of large-size. However, which do not intrinsically exhibit superconductivity. Generally, superconductivity is induced through chemical doping to introduce electrons, holes or chemical pressure in these compounds. This paper summarizes several fabrication methods on the single crystals of 122-type iron-based superconductors, including the flux method, Bridgman method, and optical floating zone method. The related research progress of these crystal growth methods are also reviewed. Besides, the recent rsearch progress related with chemical dopingof 122 iron arsenic superconductors, such aselectron doping, hole doping and isovalent doping etc. is also summerized.

Key words： review iron-based superconductor single crystal preparation method chemical doping

收稿日期: 2023-06-25

ZTFLH:

TB32

基金资助:国家重点研发计划(2021YFB3800200);国家自然科学基金(52372259);第八届中国科协青年人才托举工程(2022QNRC001)

通讯作者: 杨芳，研究员，yangfang@nwpu.edu.cn，研究方向为超导材料的制备与应用

Corresponding author: YANG Fang, Tel: 18991255975, E-mail: yangfang@nwpu.edu.cn

作者简介: 余启航，男，2000年生，硕士生

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图1 铁基超导晶体结构

图2 Ca1-x Na x Fe2As2单晶的室温X射线衍射谱[27]和BaFe2(As1 - x P x)2不同组成的(008)峰[28]

图3 制备BaFe1.87Co0.13As2单晶装置的示意图和尺寸达20 mm × 10 mm × 2 mm的BaFe1.87Co0.13As2超导单晶[32]

图4 Ba0.6K0.4Fe2As2超导单晶和BaFe2 - x Co x As2超导单晶的室温X射线衍射谱[35]

图5 用布里奇曼法制备的位于铸锭下方的Ba122超导单晶[36]和利用布里奇曼法制备的Ba(Fe1 - x Co x)2As2超导单晶的部分样品[37]

图6 用于晶体生长的密封双壁安瓿和Cs x Fe2 - y Se2超导晶体不同区域的Cs、Fe和Se元素的显微XRF分布图[38]

图7 K x Fe2 - y Se2超导单晶生长过程[41]

图8 Ba(Fe1 - x Co x)2As2 (x < 0.12)单晶超导相图[46]

图9 Ca1 - x Na x Fe2As2超导相图[54]

图10 BaFe2(As1 - x P x)2超导相图[58]

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