论文标题
宽大至地表的不良方向和拓扑绝缘子的旋转质地
Bulk-to-surface misorientation and the spin texture of topological insulators
论文作者
论文摘要
弱拓扑绝缘子具有与对称性相关的狄拉克 - 韦尔锥在表面布里渊区中，这意味着散装的低能量歧管的原理轴与正常表面之间的原理轴之间的不良反向。我们表明，弱拓扑绝缘子的这一特征带有表面旋转质地的隐藏丰富性，并且通过不良方向，螺旋纹理可以成为一种不寻常的双曲线旋转纹理。我们通过比较$ m $ - 点和$γ$ - 点dirac-weyl锥上的（111）表面上的（111）表面。
Weak topological insulators possess a symmetry related set of Dirac-Weyl cones in the surface Brillouin zone, implying misorientation between the principle axis of the low energy manifold of the bulk and the surface normal. We show that this feature of weak topological insulators comes with a hidden richness of surface spin textures, and that by misorientation a helical texture can become an unusual hyperbolic spin texture. We illustrate this effect by comparison of the $M$-point and $Γ$-point Dirac-Weyl cones on the (111) surface of the crystalline topological insulator SnTe.
