论文标题
使用对称性在蜂窝莫特绝缘子中使用对称性提取Kitaev相互作用的策略
Strategy to Extract Kitaev Interaction using Symmetry in Honeycomb Mott Insulators
论文作者
论文摘要
Kitaev自旋液体是蜂窝晶格中键依赖的Kitaev模型的基态一直是一个吸引人的中心，因为微观理论发现发现了在固态材料中发现这种相互作用的中心。不过，真实材料的挑战是海森堡的存在和另一种依赖键的伽马相互作用，这对基塔夫旋转液体有害，并且关于它们的相对优势有许多争论。在这里，我们提供了一种策略，可以利用汉密尔顿人的对称性从完整的微观模型中提取基塔夫相互作用。由两个旋转对称性相关的两个倾斜磁场方向产生了独特的自旋激发，源自Kitaev和Gamma相互作用的特定组合。与平面内和非平面磁各向异性一起，可以分别确定Kitaev和Gamma相互作用。提出动态自旋结构因子以激发未来的实验。拟议的设置将推动搜索Kitaev材料。
The Kitaev spin liquid, a ground state of the bond-dependent Kitaev model in a honeycomb lattice has been a centre of attraction, since a microscopic theory to realize such an interaction in solid-state materials was discovered. A challenge in real materials though is the presence of the Heisenberg and another bond-dependent Gamma interactions detrimental to the Kitaev spin liquid, and there have been many debates on their relative strengths. Here we offer a strategy to extract the Kitaev interaction out of a full microscopic model by utilizing the symmetries of the Hamiltonian. Two tilted magnetic field directions related by a two-fold rotational symmetry generate distinct spin excitations originating from a specific combination of the Kitaev and Gamma interactions. Together with the in- and out-of-plane magnetic anisotropy, one can determine the Kitaev and Gamma interactions separately. Dynamic spin structure factors are presented to motivate future experiments. The proposed setups will advance the search for Kitaev materials.
