| 新型铁基超导体材料的研究进展 |
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| 引用本文： | 郭建刚,金士锋,王刚,王顺冲,朱开兴,周婷婷,赖晓芳,贺蒙,陈小龙. 新型铁基超导体材料的研究进展[J]. 物理, 2011, 40(8) |
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| 作者姓名： | 郭建刚 金士锋 王刚 王顺冲 朱开兴 周婷婷 赖晓芳 贺蒙 陈小龙 |
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| 作者单位： | 1. 中国科学院物理研究所北京凝聚态物理国家实验室功能晶体研究与应用中心,北京,100190
2. 国家纳米科学中心,北京,100190 |
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| 基金项目： | 国家自然科学基金(批准号:90922037;51072226)资助项目 |
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| 摘 要： | 文章主要介绍了碱金属插层法合成新型铁基超导体的研究进展.通过采用碱金属K对FeSe层状材料插层的方法,得到了一种新型的铁基超导体K0.8Fe1.7Se2,并对该材料的晶体结构与物性进行了研究.结果表明,该化合物的超导转变温度达到30K,这是FeSe体系在常压下的最高超导转变温度.同时,观察到该体系中存在转变温度为43K的超导相,但未得到纯相.通过磁性元素Co的掺杂研究,进一步加深了对K0.8Fe1.7Se2体系超导演化规律的认识.该超导体的发现对深入认识铁基超导体的超导机理,探索具有更高超导转变温度的铁基超导体具有重要意义.
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| 关 键 词： | 层状化合物 碱金属插层 铁基超导材料 |
Recent developments of novel Fe-based superconductors |
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| GUO Jian-Gang JIN Shi-Feng WANG Gang WANG Shun-Chong ZHU Kai-Xing ZHOU Ting-Ting LAI Xiao-Fang HE Meng CHEN Xiao-Long. Recent developments of novel Fe-based superconductors[J]. Physics, 2011, 40(8) |
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| Authors: | GUO Jian-Gang JIN Shi-Feng WANG Gang WANG Shun-Chong ZHU Kai-Xing ZHOU Ting-Ting LAI Xiao-Fang HE Meng CHEN Xiao-Long |
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| Affiliation: | GUO Jian-Gang1 JIN Shi-Feng1 WANG Gang1 WANG Shun-Chong1 ZHU Kai-Xing1 ZHOU Ting-Ting1 LAI Xiao-Fang1 HE Meng2 CHEN Xiao-Long1 (1 Research & Development Center for Functional Crystals,Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China) (2 National Center for Nanoscience and Technology,China) |
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| Abstract: | This paper presents recent progress in the study of novel Fe-based superconductors. We report a new Fe-based superconductor K0.8Fe1.7Se2, which was synthesized by intercalating the alkali-metal K into FeSe layers. Its superconducting transition temperature is 30K, which is the highest value at ambient pressure among the FeSe-based materials. Meanwhile, a superconducting phase with a transition temperature of 43K also emerges in this system, but the effort to make a pure sample composed of this 43K phase has... |
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| Keywords: | layered compounds alkali-metal intercalation Fe-based superconductors |
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