The theoretical aspects of research on the role of Jahn–Teller (JT) interactions in quasi-two-dimensional iron-based high-Tc superconductors are analyzed. A model Hamiltonian for the JT distortion in iron-based superconductors is proposed by a tight-binding two-orbital model. We have proposed here a s±-wave pairing symmetry of the form coskx×cosky in the model in 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. The lattice strain energy, specific heat, conduction electron density of states and energy band structure for the system are calculated.

中文翻译：

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s±波铁基超导体双轨道模型中的Jahn-Teller畸变

Jahn-Teller (JT) 相互作用在准二维铁基高压中作用的理论研究吨C超导体进行分析。通过紧束缚双轨道模型提出了铁基超导体中 JT 畸变的模型哈密顿量。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。计算了系统的晶格应变能、比热、传导电子态密度和能带结构。