论文标题
Cu $ _2 $ o的拓扑旋转阶段的两极分化边缘状态发射
Polarized edge state emission from topological spin phases of trapped Rydberg excitons in Cu$_2$O
论文作者
论文摘要
在氧化乡村氧化物半导体中，被困的Rydberg激子的一维链中，最近已经预测了拓扑旋转相[Phys。莱特牧师。 123，126801（2019）; Arxiv：1903.11951]。该阶段的特征是稀释的抗铁磁序列为$ p $ shell激子角动量 - $ 1 $，而边缘状态的行为相似于$ 1/2 $ fermions。在这里，我们研究了有限链中基态在边缘旋转的有效相互作用而产生的良好结构中的特性。我们证明，与大体发射相比，这些边缘状态可以通过增强边缘发射的圆极化来进行光学检测。我们根据差异ANSATZ计算链中激子动量与陷阱数的分布。
In one dimensional chains of trapped Rydberg excitons in cuprous oxide semiconductor the topological spin phase has been recently predicted [Phys. Rev. Lett. 123, 126801 (2019); arXiv:1903.11951]. This phase is characterized by the diluted antiferromagnetic order of $p$-shell exciton angular momenta-$1$ and the edge states behaving akin spin-$1/2$ fermions. Here we study the properties of the ground state in the finite chains and its fine structure resulting from the effective interaction of the edge spins. We demonstrate that these edge states can detected optically via the enhancement of the circular polarization of the edge emission as compared with the emission from the bulk. We calculate the distribution of the exciton angular momentum vs. trap number in the chain numerically and analytically based on the variational ansatz.
