论文标题
ch
Topology of chalcogen chains
论文作者
论文摘要
我们研究了在元素硒和柜中发生的螺旋原子链的拓扑特性。我们假设一个现实的模型，其中包括自旋轨道相互作用，并表明这是拓扑不是平凡的，具有受晶体对称性保护的拓扑不变性。我们描述的是轨道极化的末端状态，轨道密度的调节在边缘强烈峰值。此外，我们提出了一个简化的模型，该模型分解为三个轨道链，使我们能够定义受晶体对称性保护的拓扑不变性。我们将这一结果与最近对包含$ P $ - 轨道曲折链的轨道Su-Schrieffer-Heeger模型进行了对比。
We investigate the topological properties of the helical atomic chains occurring in elemental selenium and tellurium. We postulate a realistic model that includes spin-orbit interaction and show this to be topologically non-trivial, with a topological invariant protected by a crystalline symmetry. We describe the end-states, which are orbitally polarized, with an orbital density modulation strongly peaked at the edge. Furthermore, we propose a simplified model that decomposes into three orbital chains, allowing us to define a topological invariant protected by a crystalline symmetry. We contrast this result with recent observations made for the orbital Su-Schrieffer-Heeger model containing a $p$-orbital zigzag chain.
