Multimagnon-mediated Raman scattering in two-dimensional quasiperiodic Heisenberg antiferromagnets
Multimagnon-mediated Raman scattering in two-dimensional quasiperiodic Heisenberg antiferromagnets
复制标题
二维准周期海森堡反铁磁体中的多磁振介导拉曼散射
DOI：
10.1088/1742-6596/2461/1/012012
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
J. Ohara
中科院分区：
文献类型：
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作者：
S. Yamamoto;J. Ohara
我们证明了组态相互作用和绿色函数方法的Shastry-Shraiman四阶磁拉曼响应的海森堡反铁磁体的二维C5 v彭罗斯和C8 v Ammann-Beenker晶格。在Loudon-Fleury二阶微扰方案之外，另外两个对称性物种A1和A2变得拉曼活性，从而打破了E2对称性的去偏振Loudon-Fleury拉曼响应。A1模和A2模分别由动力学环交换和手征自旋涨落激活，前者主要由多磁振子散射引起，后者主要由不同菱体的非周期性排列引起.
We demonstrate configuration-interaction and Green's function approaches to the Shastry-Shraiman fourth-order magnetic Raman response of Heisenberg antiferromagnets on the two-dimensional C 5v Penrose and C 8v Ammann-Beenker lattices. Beyond the Loudon-Fleury second-order perturbation scheme, two more symmetry species A 1 and A 2 become Raman-active to break the depolarized Loudon-Fleury Raman response of E 2 symmetry. The A 1 and A 2 modes are activated by dynamic ring exchange and chiral spin fluctuations, respectively, the former of which owes much to multimagnon scatterings in a complicated manner, while the latter of which owes much to aperiodic arrangements of different rhombuses.