论文标题
无量子量子Paramagnet具有沮丧的关键性和在旋转1蜂窝晶格磁铁上竞争的螺旋磁力
Featureless quantum paramagnet with frustrated criticality and competing spiral magnetism on spin-1 honeycomb lattice magnet
论文作者
论文摘要
我们研究了具有沮丧的交换相互作用的Spin-1蜂窝晶格磁铁。所提出的微观自旋模型包含第一和第二个邻居海森堡相互作用以及单离子各向异性。我们建立了一个丰富的相图，其中包括一个由量子障碍的秩序机理引起的无特征量子paramagnet和各种旋转螺旋状的状态。尽管量子Paramagnet被称为无特征，但显示出磁激发在频带minima的相互空间中形成了轮廓变性。这些轮廓退化激发是导致从量子Paramagnet到有序相的沮丧的关键。这项工作说明了磁性挫败感对磁有序和磁激发的影响。我们讨论了与各种基于NI的蜂窝晶格磁铁的实验相关性。
We study the spin-1 honeycomb lattice magnets with frustrated exchange interactions. The proposed microscopic spin model contains first and second neighbor Heisenberg interactions as well as the single-ion anisotropy. We establish a rich phase diagram that includes a featureless quantum paramagnet and various spin spiral states induced by the mechanism of order by quantum disorder. Although the quantum paramagnet is dubbed featureless, it is shown that, the magnetic excitations develop a contour degeneracy in the reciprocal space at the band minima. These contour degenerate excitations are responsible for the frustrated criticality from the quantum paramagnet to the ordered phases. This work illustrates the effects of magnetic frustration on both magnetic orderings and the magnetic excitations. We discuss the experimental relevance to various Ni-based honeycomb lattice magnets.
