Microstructure and structural phase transitions in iron-based superconductors |
| |
| Authors: | Wang Zhen Cai Yao Yang Huai-Xin Tian Huan-Fang Wang Zhi-Wei Ma Chao Chen Zhen and Li Jian-Qi |
| |
| Affiliation: | Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China |
| |
| Abstract: | Crystal structures and microstructural features, such as structural phase transitions, defect structures, and chemical and structural inhomogeneities, are known to have profound effects on the physical properties of superconducting materials. Recently, many studies on the structural properties of Fe-based high-T c superconductors have been published. This review article will mainly focus on the typical microstructural features in samples that have been well characterized by physical measurements. (i) Certain common structural features are discussed, in particular, the crystal structural features for different superconducting families, the local structural distortions in the Fe2Pn2 (Pn = P, As, Sb) or Fe2Ch2 (Ch = S, Se, Te) blocks, and the structural transformations in the 122 system. (ii) In FeTe(Se) (11 family), the superconductivity, chemical and structural inhomogeneities are investigated and discussed in correlation with superconductivity. (iii) In the K0.8Fe1.6+x Se2system, we focus on the typical compounds with emphasis on the Fe-vacancy order and phase separations. The microstructural features in other superconducting materials are also briefly discussed. |
| |
| Keywords: | Fe-based superconductor structural transition structural inhomogeneity phase separation |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
