论文标题
Spin-3/2平方晶格抗fiferromagnet中的全球量子相图和非亚伯手性自旋液体
Global quantum phase diagram and non-Abelian chiral spin liquid in a spin-3/2 square lattice antiferromagnet
论文作者
论文摘要
由于强量子波动对于量子自旋液体的出现至关重要，因此在旋转$ 1/2 $系统中对自旋液体候选物进行了广泛的探索和鉴定，而这种活动在更高的自旋系统中很少见。在这里，我们报告了一个在方格上以旋转$ 3/2 $ HEISENBERG型号出现的非亚伯手性旋转液体的示例。通过调整Heisenberg交换相互作用和标量性手性相互作用，我们根据密度基质矩阵重新归一化组的研究绘制了一个封闭三个常规磁性和手性旋转液体的量子相图。旋转液体的性质被确定为长期以来的骨气版本的red-rezayi状态，该状态支持基态纠缠频谱确定的非亚伯纤维纤维菌统计。值得注意的是，我们确定非亚伯CSL通过扩大的局部自由度和增强的量子波动而出现，并增强了竞争磁性的经典相位边界。我们以旋转$ 3/2 $系统对异国情调的量子自旋液体的数字发现提出了一种新的途径，可以在沮丧的更高自旋磁性化合物中发现分数化的量子阶段。
Since strong quantum fluctuations are essential for the emergence of quantum spin liquids, there have been extensive exploration and identification of spin liquid candidates in spin-$1/2$ systems, while such activities are rare in higher spin systems. Here we report an example of non-Abelian chiral spin liquid emerging in spin-$3/2$ Heisenberg model on a square lattice. By tuning Heisenberg exchange interaction and scalar chirality interaction, we map out a quantum phase diagram enclosing three conventional magnetic orders and a chiral spin liquid based on density matrix renormalization group studies. The nature of the spin liquid is identified as a long-sought bosonic version of Read-Rezayi state that supports non-Abelian Fibonacci anyonic statistics, identified by the ground state entanglement spectrum. Significantly, we establish that the non-Abelian CSL emerges through the enlarged local degrees of freedom and enhanced quantum fluctuations near the classical phase boundaries of competing magnetic orders. Our numerical discovery of an exotic quantum spin liquid in spin-$3/2$ system suggests a new route for discovering fractionalized quantum phases in frustrated higher spin magnetic compounds.
