论文标题
二维量子旋转轨道液体的动力学：费米子镁的光谱特征
Dynamics of a two-dimensional quantum spin-orbital liquid: spectroscopic signatures of fermionic magnons
论文作者
论文摘要
我们提供了SU（2） - 对称Kitaev Honeycomb晶格模型的量子自旋轨道液相的动力相关性的精确研究。我们表明，这种Kugel-Khomskii类型模型中的自旋动力学正是S = 1效率的磁蛋白的密度密度相关函数，可以在谐振无弹性X射线散射实验中探测。我们预测了非弹性散射实验中自旋轨道分数化的特征特征，并将其与自旋 - 抗肌瘤的kitaev蜂窝旋转液体进行了比较。特别是，共振的非弹性X射线散射响应显示出与费米克激发的分散性直接相关的特征动量依赖性。中子散射横截面显示了费米子镁和自旋轨道激发的混合响应。后者具有宽阔的激发带宽，并且比Spin-1/2 Kitaev模型大三倍的Vison间隙。
We provide an exact study of dynamical correlations for the quantum spin-orbital liquid phases of an SU(2)-symmetric Kitaev honeycomb lattice model. We show that the spin dynamics in this Kugel-Khomskii type model is exactly the density-density correlation function of S=1 fermionic magnons, which could be probed in resonant inelastic x-ray scattering experiments. We predict the characteristic signatures of spin-orbital fractionalization in inelastic scattering experiments and compare them to the ones of the spin-anisotropic Kitaev honeycomb spin liquid. In particular, the resonant inelastic x-ray scattering response shows a characteristic momentum dependence directly related to the dispersion of fermionic excitations. The neutron scattering cross section displays a mixed response of fermionic magnons as well as spin-orbital excitations. The latter has a bandwidth of broad excitations and a vison gap that is three times larger than that of the spin-1/2 Kitaev model.
