“111”体系铁基超导体是由中国科学院物理研究所发现的新型铁砷超导 材料。本文首先对 4 种“111”体系超导体：LiFeAs, NaFeAs,LiFeP 及 CuFeAs 的晶体结构，磁结构等进行了介绍。它们的空间群均为 P4/nmm,具有 Cu2Sb 型 晶体结构。LiFeAs 的超导转变温度为 TC约为 18K。NaFeAs 的超导转变温度 TC 约为 26K ，在加压到 3Gpa 时为 31K。LiFeP 的超导转变温度为 TC约为 6K。还 未发现 CuFeAs 具有超导电性，其反铁磁性转变温度 TN 约为 9K。此外， “111” 型 LiFeAs 超导体没有反铁磁相变并且本身就超导，有着区别于其他铁基超导 体的独特的性质，更能反映出掺杂效应的本质。因此，国内外科学家们主要 致力于用溶剂（常用 LiAs 或 Sn）生长单晶的方法生长出不同比例的过渡金属 元素（Cu,Co,Ni)掺杂的 LiFe1-xTMxAs 单晶样品对过渡金属掺杂效应进行研究。 过渡金属掺杂效应的研究常涉及 LiFe1-xTMxAs 单晶样品的晶体结构，超导转变 温度 TC，剩余电阻率比 RRR 与掺杂水平 x 的关系，及 Cu，Co，Ni 掺杂是否代 入电子的研究。 本文主要就国内外已发表的 LiFeAs 的 Cu,Co 和 Ni 的掺杂效应文献进行综 述。

‘111’ system of iron-based superconductors is a new kind of arsenic superconducting material found by the institute of physics, Chinese academy of sciences. The article firstly introduce four ‘111’ iron-based superconductors: LiFeAs, NaFeAs, LiFeP and CuFeAs from crystal structure, magnetic structure, etc. The space group of them were P4 / nmm, and they have the same Cu2Sb-type structure. LiFeAs has a superconducting transition temperature TC of ~18K. Superconducting transition temperature TC of NaFeAs can increases from 26K to a maximum of 31K as the pressure increases from ambient pressure to 3GPa. LiFeP has a superconducting transition temperature TC of~6K. So far, we haven’t found tsuperconductivity of CuFeAs, but its antiferromagnetic transition temperature TN of ~9K has been found by researchers. In addition, LiFeAs has no antiferromagnetic phase and it has superconductivity un-doped which is different from other iron arsenic superconductors. Therefore , the research of LiFeAs can reflect the nature of the doping effect. Scientists at home and abroad, therefore, is mainly engaged in studying doped samples of LiFeAs different proportion of the transition metal elements (Cu, Co, Ni) grown by solvent (common LiAs or Sn) growth methods to understand the doping effect. Transition metal doping effect research often involve the crystal structure, superconducting tranisition temperature TC, residual resistivity ratio (RRR) and the doped-leveling x,and whether Cu, Co or Ni doped into electron. This paper has reviewed papers published in home and abroad that study Cu, Co, Ni doping effect in ‘111’ type superconductor LiFeAs.