论文标题
二维准静脉反铁磁铁的偏振拉曼响应：配置与格林的功能方法
Polarized Raman Response of Two-Dimensional Quasiperiodic Antiferromagnets: Configuration-Interaction versus Green's Function Approaches
论文作者
论文摘要
我们研究了海森伯格反铁磁铁对$ \ mathbf {c} _ \ mathrm {5v} $ penrose和$ \ mathbf {c} _ \ mathrm {8v} $ AMMANN-BEENKER PERISTER SECTIRAL SECTIRAL PERERERIAL SECTION PERTIRAL SECTORTIST PERTIRAL SECTORTIST PERTIRE pOTTIRE tottertimpertiral pertirate poec pertiration Pertiration Pertiration Pertiration pertiral pertirate pertirtir pertirtian pertiria Quasiperiodic磁铁。在Loudon-Fleury机制中，我们找到了$ \ mathrm {e} _2 $对称的一种和唯一的拉曼活性模式，而无需任何对线性事件和散射极化的依赖。除了Loudon-Fleury机制之外，另外两个对称物种$ \ MATHRM {a} _1 $和$ \ MATHRM {a} _2 $通过动态环交换和手性旋转波动激活，可以通过圆形的使用以及线性极性来提取。一方面，我们采用了Green的功能，另一方面采用了构型交流波形，以计算对非弹性光散射的多类贡献。证明了配置相互作用方案的最大优势，我们揭示了Shastry-Shraiman四阶拉曼强度的主要部分是由多磁磁波动介导的。
We study Raman response of Heisenberg antiferromagnets on the $\mathbf{C}_\mathrm{5v}$ Penrose and $\mathbf{C}_\mathrm{8v}$ Ammann-Beenker lattices within and beyond the Loudon-Fleury second-order perturbation scheme intending to explore optical features peculiar to quasiperiodic magnets. Within the Loudon-Fleury mechanism, we find one and only Raman-active mode of $\mathrm{E}_2$ symmetry without any dependence on linear incident and scattered polarizations. Beyond the Loudon-Fleury mechanism, two more symmetry species $\mathrm{A}_1$ and $\mathrm{A}_2$ are activated via dynamic ring exchange and chiral spin fluctuations, respectively, which can be extracted by the use of circular as well as linear polarizations. We employ Green's functions on one hand and configuration-interaction wavefunctions on the other hand to calculate the multimagnon contributions to inelastic light scatterings. Demonstrating the great advantage of the configuration-interaction scheme, we reveal that a major portion of the Shastry-Shraiman fourth-order Raman intensity is mediated by multimagnon fluctuations.
