LaO1-xFxBiS2 层状材料超导电性研究

层状材料一直是超导研究领域的热点材料, 陆续有数十种新型的层状超导材料被不断发现, 从至今为止超导转变温度最高的铜氧化物材料, 到铁基超导, 再到诸多新型的层状材料, 学者们关于超导微观机制的理解也在随之更新, 从取得成功的 Bardeen-Cooper-Schrieffer 经典理论到至今无法解释的非常规超导机制, 研究之路从未停止. 本文将研究利用助熔剂法合成的 LaO1 -xFxBiS2 材料的结构、 电阻、 磁化率等性质, 并与国际社会上已存在的研究成果进行对比, 同时从晶体结构、 压力效应、 体超导电性、 临界温度、 微观机制五个方面, 对近年发现的镧系铋硫基层状超导材料的研究情况进行讨论.

Study on Superconductivity of LaO1-xFxBiS2 Layered Materials

Layered materials always is a hot topic in the field of superconductivity, and dozens of new layered superconductors are discovered. From cup rate superconductors with the highest superconductivity transition temperature, to the iron-based superconductors, and to many new layered materials, researchers'' understanding of superconductivity mechanism is also being updated, From the successful Bardeen-Cooper-Schrieffer classical theory to the unconventional superconductivity mechanism that cannot be explained up, it has never stopped. In this paper, the crystal structure, electrical resistivity, magnetic susceptibility and other properties of LaO1 -xFxBiS2 synthesized by flux method are studied, and the existing research results are compared. Meanwhile, the recent discovery of lanthanide bismuth-sulfur based layered superconductor are discussed from crystal structure, pressure effect, bulk superconductivity, critical temperature, and superconductivity mechanism.