论文标题
在中间相互作用强度下，哈驼峰模型中超导性的机理
Mechanism of Superconductivity in the Hubbard Model at Intermediate Interaction Strength
论文作者
论文摘要
我们研究了负责在$ d $ d $波的超导状态中配对的波动，该状态在中间耦合的二维Hubbard模型中，在群集动态均值场理论中，具有数值精确的量子杂质求解器。通过分析动量和频率依赖性波动如何在不同表示形式中产生$ d $波浪超导状态，我们将抗磁性波动视为在不足和实施式范围内超导性的配对胶。然而，在中间耦合方案中，主要的磁波动可能与常规自旋 - 透失理论所描述的磁波显着不同。
We study the fluctuations responsible for pairing in the $d$-wave superconducting state of the two-dimensional Hubbard model at intermediate coupling within a cluster dynamical mean-field theory with a numerically exact quantum impurity solver. By analyzing how momentum and frequency dependent fluctuations generate the $d-$wave superconducting state in different representations, we identify antiferromagnetic fluctuations as the pairing glue of superconductivity both in the underdoped and the overdoped regime. Nevertheless, in the intermediate coupling regime, the predominant magnetic fluctuations may differ significantly from those described by conventional spin-fluctuation theory.
