论文标题
在三角形晶格上具有强烈手性激发的巨大量子自旋液体的光谱
Spectra of a Gapped Quantum Spin Liquid with a Strong Chiral Excitation on the Triangular Lattice
论文作者
论文摘要
尽管在三角晶格上通过数值计算的$ J_1 $ - $ J_2 $ HEISENBERG模型中已经确定了量子自旋液体（QSL）阶段，但关于这种QSL是否被散布还是无差距，与不同技术的矛盾结论有关。此外，有关激发和动力学的信息对于此类阶段的实验检测至关重要。 In this work, we use exact diagonalization to characterize signatures of a QSL phase on the triangular lattice through the dynamical spin structure factor $\mathcal{S}(q,ω)$ and Raman susceptibility $\mathcalχ(ω)$.我们发现，与相邻阶段相比，QSL相的光谱显示出不同的特征。拉曼光谱和自旋结构因子在QSL阶段都表现出差异的行为。有趣的是，拉曼$ A_2 $通道中有一个突出的激发模式，表明对手性旋转液相的倾斜趋势很强。
While a quantum spin liquid (QSL) phase has been identified in the $J_1$-$J_2$ Heisenberg model on a triangular lattice via numerical calculations, debate persists about whether or not such a QSL is gapped or gapless, with contradictory conclusions from different techniques. Moreover, information about excitations and dynamics is crucial for the experimental detection of such a phase. In this work, we use exact diagonalization to characterize signatures of a QSL phase on the triangular lattice through the dynamical spin structure factor $\mathcal{S}(q,ω)$ and Raman susceptibility $\mathcalχ(ω)$. We find that spectra for the QSL phase show distinct features compared to those of neighboring phases; and both the Raman spectra and spin structure factor show gapped behaviour in the QSL phase. Interestingly, there is a prominent excitation mode in the Raman $A_2$ channel, indicating a strong subleading tendency toward a chiral spin liquid phase.
