高温超导物理的研究一直是凝聚态物理研究的持续热点问题，本项目计划以近年引起广泛关注的铁基高温超导体为研究对象。由于磁性在铁基超导的研究中具有重要作用，我们将着重研究自旋动力学性质，以及与其相关的超导性质。我们将以母体化合物的磁结构和自旋激发的研究为基础，在自旋涨落机制框架下，研究铁基超导体的超导配对对称性，我们将给出配对对称性随系统参数的演化。进而探讨自旋与轨道、电荷自由度的相互作用，通过超导态的自旋共振模式、电荷准粒子线形变化和电荷输运性质的研究，为高温超导微观机理的研究提供重要的研究资料。在此基础上，进一步研究杂质和局域磁矩对超导态低能性质的影响。

The research on the physics of high-temperature superconductors has been a recurring theme in condensed-matter physics. In this project, we will study the iron-based high-temperature superconductors that have attracted significant attention in recent years. Since the magnetism plays an important role in the iron-base superconductors, we focus on the spin dynamics and the related superconducting properties. As a first step, we will study magnetic structures and spin excitations in the parent compounds. Then, we will study the pairing symmetry in the iron-based superconductors by considering the pairing mechanism due to the exchange of spin fluctuations, and we will give the variations of pairing functions according the parameters. To clarify the interlplays between spin, orbital and charge, we will study the the spin resonance mode, the line shape of charge quasiparticle and transport properters. And this will provide important informations for the research of the superconducting mechanism. On this basis, we will further study the influence of the impurities and local moments on the properties of low-energy excitations in superconducting states.