论文标题
一个安德森杂质与量子旋转厅绝缘子中的螺旋边缘状态相互作用
An Anderson impurity interacting with the helical edge states in a quantum spin Hall insulator
论文作者
论文摘要
使用自然轨道重归其化组（NORG）方法，我们研究了量子旋转厅绝缘子中与螺旋边缘状态相互作用的安德森杂质的局部自旋的筛选。我们发现在杂质部位形成了一个局部旋转，局部自旋被量子自旋大厅绝缘子中的电子完全筛选。同时，局部自旋通过单个活跃的天然轨道占主导地位。然后，我们表明，在自然轨道形式主义的框架内，围绕筛查机制变得透明和简单。我们分别将活跃的天然轨道投射到真实的空间和动量空间中，以表征其结构。我们根据杂质夫妻的边缘的占用状态确定边缘状态的自旋摩托锁定属性。此外，我们研究了由状态的局部密度代表的活性天然轨道的动力学特性，我们从中观察到近托共振峰。
Using the natural orbitals renormalization group (NORG) method, we have investigated the screening of the local spin of an Anderson impurity interacting with the helical edge states in a quantum spin Hall insulator. We find that there is a local spin formed at the impurity site and the local spin is completely screened by electrons in the quantum spin Hall insulator. Meanwhile, the local spin is screened dominantly by a single active natural orbital. We then show that the Kondo screening mechanism becomes transparent and simple in the framework of natural orbitals formalism. We project the active natural orbital respectively into real space and momentum space to characterize its structure. And we confirm the spin-momentum locking property of the edge states based on the occupancy of a Bloch state in the edge to which the impurity couples. Furthermore, we study the dynamical property of the active natural orbital represented by the local density of states, from which we observe the Kondo resonance peak.
