论文标题
Kitaev HyperHoneyComb iRITAS $β$ -LI $ _2 $ iro $ _3 $中的磁激发和互动
Magnetic Excitations and Interactions in the Kitaev Hyperhoneycomb Iridate $β$-Li$_2$IrO$_3$
论文作者
论文摘要
我们使用无弹性中子散射（INS），时域THZ光谱镜检查和热容量测量的组合，对三维超值com kitaev磁铁$β$ -LI $ _2 $ iro $ _3 $进行了彻底的实验研究。主要结果包括对INS光谱重量的大规模低温重组，该重量的变化量在12 MeV左右的宽峰中演变成一个宽峰，在2.8（1）MEV的THZ数据中，THZ数据中有一个独特的峰值。与粉末平均的自旋波理论计算的详细比较表明，这两个特征的位置分别受各向异性$γ$耦合和Heisenberg Exchange $ J $控制。精制的微观旋转模型将$β$ -li $ _2 $ iro $ _3 $紧密靠近Kitaev旋转液相。
We present a thorough experimental study of the three-dimensional hyperhoneycomb Kitaev magnet $β$-Li$_2$IrO$_3$, using a combination of inelastic neutron scattering (INS), time-domain THz spectroscopy, and heat capacity measurements. The main results include a massive low-temperature reorganization of the INS spectral weight that evolves into a broad peak centered around 12 meV, and a distinctive peak in the THz data at 2.8(1) meV. A detailed comparison to powder-averaged spin-wave theory calculations reveals that the positions of these two features are controlled by the anisotropic $Γ$ coupling and the Heisenberg exchange $J$, respectively. The refined microscopic spin model places $β$-Li$_2$IrO$_3$ in close proximity to the Kitaev spin liquid phase.
