论文标题
J1的Schwinger Boson理论
Schwinger boson theory of the J1,J2=J3 kagome antiferromagnet
论文作者
论文摘要
我们沿j2 = j3 = j线研究了使用第一J1，第二J2和第三J3邻域交换的量子自旋1/2的kagome抗铁磁铁。我们使用Schwinger-Boson平均场理论来精确地确定相图，并将两种不同的汉密尔顿转换来建立有关过渡起源的直觉。在J = 0处获得的旋转液体基本上保持在大窗口上，最多可j = 1/3，因为它仅因j项而弱沮丧。然后在J = 1/2时，由于局部磁波的性质变化，中间Z2自旋液体将其凝结成远程手性顺序。作为附带的好处，我们的哈密顿式改写为我们在Husimi Cactus上的模型基础状态提供了精确的解决方案。
We study the kagome antiferromagnet for quantum spin-1/2 with first J1, second J2 and third J3 neighbour exchanges, along the J2 = J3 = J line. We use Schwinger-boson mean-field theory for the precise determination of the phase diagram, and two different rewritings of the Hamiltonian to build an intuition about the origin of the transitions. The spin liquid obtained at J = 0 remains essentially stable over a large window, up to J = 1/3, because it is only weakly frustrated by the J term. Then at J = 1/2, the intermediate Z2 spin liquid condenses into a long-range chiral order because of the change of nature of local magnetic fluctuations. As a side benefit, our Hamiltonian rewriting offers an exact solution for the ground state of our model on a Husimi cactus.
