122 体系铁基超导单晶的制备及其化学掺杂研究进展

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.