论文标题
kekule旋转轨道二聚体阶段和三位化动力学
Kekule spin-orbit dimer phase and triplon dynamics
论文作者
论文摘要
我们在蜂窝晶状体上得出并研究具有$ d^1 $电子构型离子的旋转轨道模型。在此系统中，$ t_ {2g} $轨道的定向特征会导致广泛退化的二聚体基态。我们发现，来自电荷转移过程的其他相互作用完全提高了堕落性，并稳定了二聚体形成Kagome超级晶格的Kekule旋转轨道二聚体。对于此类阶段，三位谱带光谱类似于kagome晶格的电子带结构，并在存在二聚体间dzyaloshinskii-moriya相互作用的情况下在拓扑上变得无处不在。作为对Kekule二聚相的实验验证，我们提出了热霍尔实验，该实验可以直接揭示相应的三位体带光谱的拓扑轮廓。
We derive and study a spin-orbital model for ions with $d^1$ electronic configuration on a honeycomb lattice. In this system, the directional character of $t_{2g}$ orbital leads to extensively degenerate dimerized ground states. We find that additional interactions from charge transfer processes completely lift the degeneracy and stabilize the Kekule spin-orbit dimerized phase where dimers form a kagome superlattice. For such phase, the triplon band spectrum resembles the electronic band structure of the kagome lattice and becomes topologically non-trivial in the presence of inter-dimer Dzyaloshinskii-Moriya interactions. As an experimental verification of the Kekule dimerized phase, we propose the thermal Hall experiment, which can directly uncover the topological profile of the corresponding triplon band spectrum.
