论文标题
量子自旋列在哪里？
Where is the Quantum Spin Nematic?
论文作者
论文摘要
我们使用分析和密度 - 矩阵ren量化组方法提供了旋转nematic状态的有力证据。在零字段中，自旋翼对的吸引力导致一阶转变，没有列表状态，而较大$ j_2 $的成对抑制稳定在配对敏感场附近的狭窄区域中。魔鬼的多对冷凝物的楼梯是针对弱的配对。与幼稚的期望相比，多体效应对自旋裂纹间隙的抑制会导致列中的静态收缩。所提出的相图应广泛有效。
We provide strong evidence of the spin-nematic state in a paradigmatic ferro-antiferromagnetic $J_1$--$J_2$ model using analytical and density-matrix renormalization group methods. In zero field, the attraction of spin-flip pairs leads to a first-order transition and no nematic state, while pair-repulsion at larger $J_2$ stabilizes the nematic phase in a narrow region near the pair-condensation field. A devil's staircase of multi-pair condensates is conjectured for weak pair-attraction. A suppression of the spin-flip gap by many-body effects leads to an order-of-magnitude contraction of the nematic phase compared to naïve expectations. The proposed phase diagram should be broadly valid.
