In high-Tc superconductors, electrons form pairs and electric transport becomes dissipation-less at low temperatures. The iron-based superconductors (FeSCs) have the highest superconducting (SC) transition temperature next to copper oxides. The gap structure and pairing mechanism for FeSCs are hotly discussed as a central issue since their discovery. A model Hamiltonian for the superconductivity in FeSCs is proposed by a tight-binding two-orbital model. The SC gap, conduction electron density of states, specific heat and energy band structure for the system are calculated. We have proposed here a s±-wave pairing symmetry of the form coskx×cosky in the model in the mean-field approximation. The model is solved by Zubarev’s double-time Green’s function technique to find the self-consistent gap equation and is solved self-consistently.

中文翻译：

---

s±波铁基超导体双轨道模型中的超导性

在高吨C超导体，电子形成对并且电传输在低温下变得更少耗散。铁基超导体 (FeSC) 具有仅次于氧化铜的最高超导 (SC) 转变温度。FeSCs 的间隙结构和配对机制自发现以来一直是一个核心问题。通过紧束缚双轨道模型提出了 FeSCs 中超导性的模型哈密顿量。计算了系统的SC间隙、传导电子态密度、比热和能带结构。我们在这里提出了一个s±-波配对对称形式因ķX×因ķ是的在平均场近似的模型中。该模型通过Zubarev的双次格林函数技术求解，找到自洽间隙方程并自洽求解。