论文标题
用手性$ d + id $和$ s $对称性的超导阶段的热波动在三角晶格上
Thermal fluctuations in superconducting phases with chiral $ d + id $ and $ s $ symmetry on a triangular lattice
论文作者
论文摘要
研究了具有扩展$ s $和手性$ d + id $对称性的超导订单参数的热波动的行为。这项研究是在准二维单波段模型框架内的三角形晶格上进行的，相邻位点的电子之间的吸引力吸引。基于功能整合理论，使用耦合电子对的波动来始终考虑阶参数波动和电荷载体散射的方法。根据温度和电荷载体浓度，相位波动概率的分布函数。计算了平均超导顺序参数的幅度的温度依赖性。为电荷载体浓度的整个变化范围构建了超导状态的相图$ 0 <n <2 $。在该范围的边界附近，实现了具有扩展$ s $对称性的拓扑上的超导状态，而在它们之间实现了具有拓扑性非琐事的手性$ D + ID $对称性的超导状态。将计算出的异常自我吸收与使用机器学习技术获得的实验性自我抗药进行了比较。
The behavior of thermal fluctuations of a superconducting order parameter with extended $ s $ and chiral $ d + id $ symmetry is investigated. The study is carried out on a triangular lattice within the framework of the quasi-two-dimensional single-band model with attraction between electrons at neighboring sites. The method of consistent consideration of the order parameter fluctuations and the charge carrier scattering by fluctuations of coupled electron pairs, based on the theory of functional integration is used. The distribution functions of the phase fluctuation probabilities depending on temperature and charge carrier concentration are obtained. The temperature dependences of the amplitudes of the averaged superconducting order parameter are calculated. A phase diagram of superconducting states is constructed for the entire range of variation in the charge carrier concentration $ 0 <n <2 $. Near the boundaries of this range, topologically trivial superconducting states with extended $ s $ symmetry are realized, while a superconducting state with topologically nontrivial chiral $ d + id $ symmetry is realized between them. The calculated anomalous self-energies are compared with the experimental ones obtained using machine learning techniques.
