摘要
A new FeSe-based superconductor （C2H8N2）x FeSe with ethylenediamine intercalated into FeSe was suc- cessfully synthesized by the solvothermal method, which is the first superconducting instance by metal-free organic molecule intercalation. Elemental analysis and TG-IR-GC/MS data re- veal that the ethylenediamine molecules in the interlayer space are separate and intact. The X-ray diffraction （XRD） pattern indicates that the intercalation compound is an orthorhombic lattice rather than a tetragonal lattice applying to almost all the previous FeSe-based superconductors at room tempera- ture. The magnetism measurements display a sharp super- conducting transition at -10 K which is assigned to （C2H8N2）xFeSe, and a tiny drop in susceptibility at -30 K.
本文采用水热法成功合成了一种新型铁硒基超导体(C_2H_8N_2)_xFeSe,FeSe层间只有乙二胺分子而不包含其他任何金属.碳氢氮元素分析和热重-红外-质谱联合分析的数据都表明层间的乙二胺分子是完整而且独立的.X射线衍射图指出插层化合物是一个正交格子,而以往铁硒基超导体在常温下几乎都是四方格子.磁性测量的数据显示产物在10 K左右有一个大的超导转变,可归结于插层产物(C_2H_8N_2)_xFeSe.此外,在30 K处也观察到一个很小的超导转变,这可能是杂质引起的.
作者
Zhan Gao
Suyuan Zeng
Baichuan Zhu
Biao Li
Qiaoyan Hao
Yiwei Hu
Dake Wang
Kaibin Tang
高展;曾涑源;朱百川;厉彪;郝巧燕;胡屹伟;王大可;唐凯斌(Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei 230026, China;College of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China)
基金
supported by the National Natural Science Foundation of China (21671182)
