论文标题
完美的一维界面状态，在三维拓扑绝缘子的扭曲堆栈中
Perfect one-dimensional interface states in a twisted stack of three-dimensional topological insulators
论文作者
论文摘要
从理论上讲，我们研究了三维拓扑绝缘子的扭曲堆栈中界面状态的电子结构。当表面狄拉克锥的中心位于BZ边界侧的中点时，我们发现，即使Moiré模式本身是等同于同性恋，即使表面状态的界面杂交也会形成几乎独立的一维通道。这两个反传播通道具有相反的自旋极化，并且它们可通过自旋非依赖性杂质散射稳定。平行通道之间的耦合可以通过扭转角度调节。唯一的1D状态可以理解为有效的兰道水平，其中扭曲角可以用作虚拟磁场。
We theoretically study the electronic structure of interface states in twisted stacks of three-dimensional topological insulators. When the center of the surface Dirac cone is located at a midpoint of a side of BZ boundary, we find that an array of nearly-independent one-dimensional channels is formed by the interface hybridization of the surface states, even when the moiré pattern itself is isotropic. The two counter-propagating channels have opposite spin polarization, and they are robust against scattering by spin-independent impurities. The coupling between the parallel channels can be tuned by the twist angle.The unique 1D states can be understood as effective Landau levels where the twist angle works as a fictitious magnetic field.
