论文标题
莫特过渡作为拓扑相变
The Mott transition as a topological phase transition
论文作者
论文摘要
我们表明，标准一频哈伯德模型中的Mott Metal-Metal-Metul-unsulator转变可以理解为拓扑相变。我们的方法的启发是从观察到的，即莫特绝缘子的自我能源中的中间隙极类似于拓扑绝缘体中局部表面状态的零能光谱极。我们使用NRG-DMFT来求解无限的二维Hubbard模型，并根据辅助紧密结合链的边界的函数表示所得的局部自我能源，而无需相互作用。辅助系统是广义的SSH模型类型；莫特过渡对应于域壁的解离。
We show that the Mott metal-insulator transition in the standard one-band Hubbard model can be understood as a topological phase transition. Our approach is inspired by the observation that the mid-gap pole in the self-energy of a Mott insulator resembles the zero-energy spectral pole of the localized surface state in a topological insulator. We use NRG-DMFT to solve the infinite-dimensional Hubbard model, and represent the resulting local self-energy in terms of the boundary Green's function of an auxiliary tight-binding chain without interactions. The auxiliary system is of generalized SSH model type; the Mott transition corresponds to a dissociation of domain walls.
