论文标题
Ba $ _3 $ cosb $ _2 $ o $ $ _9 $的磁频谱中的两翼绑定状态的证据
Evidence of Two-Spinon Bound States in the Magnetic Spectrum of Ba$_3$CoSb$_2$O$_9$
论文作者
论文摘要
三角形反铁磁铁BA $ _3 $ cosb $ _2 $ o $ $ _9 $的最新非弹性中子散射（INS）实验显示出与半经典理论的强烈偏差。我们证明，除了鞍点近似之外，Parton Schwinger Boson理论可以很好地再现INS数据的关键特征。测得的木剂分散液通过两翼绑定状态的分散体（紧急规格场传播器的极点）进行了很好的再现，而低能连续散射的散射是由准确的两翼连续脉的重现的，这表明是一个良好的初始框架，可以很好地研究磁性有序状态的良好初始框架。
Recent inelastic neutron scattering (INS) experiments of the triangular antiferromagnet Ba$_3$CoSb$_2$O$_9$ revealed strong deviations from semiclassical theories. We demonstrate that key features of the INS data are well reproduced by a parton Schwinger boson theory beyond the saddle-point approximation. The measured magnon dispersion is well reproduced by the dispersion of two-spinon bound states (poles of the emergent gauge fields propagator), while the low-energy continuum scattering is reproduced by a quasifree two-spinon continuum, suggesting that a free-spinon gas is a good initial framework to study magnetically ordered states near a quantum melting point.
