Discord effects of inter-cluster interactions on a cluster-based Haldane state in a triangular spin tube
Discord effects of inter-cluster interactions on a cluster-based Haldane state in a triangular spin tube
复制标题
三角形自旋管中团簇间相互作用对基于团簇的 Haldane 态的不一致效应
DOI：
10.1088/1742-6596/2164/1/012029
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Tohyama Takami
中科院分区：
文献类型：
--
作者：
Sugimoto Takanori;Tohyama Takami
我们最近提出了一个由固有手性支持的基于团簇的霍尔丹态的新概念，在三角形自旋管中具有等效的团簇间相互作用。在这种状态下，出现由实自旋和标量手性组成的1/2自由度边缘态。在施加磁场的情况下，由于实自旋和手性的对称性，我们可以观察到S= 1/2自旋的磁化强度约为1/2，即1/ 4自旋磁化强度。在这里，我们考虑了两种簇间相互作用不协调的影响，诱导了有效S= 1自旋的各向异性双二次相互作用。这种不协调使边缘磁化更接近于四分之一自旋磁化的精确值，而边缘态的局域化变得更差。这些效应也在相应的自旋-1模型中得到证实。
We have recently proposed a new concept of cluster-based Haldane states supported by an inherent chirality in a triangular spin tube with equivalent inter-cluster interactions. In this state, there appear spin-1/2 degrees of freedom consisting of a real spin and a scalar chirality as edge states. With applying a magnetic field, we can observe approximately a half of magnetization of S= 1/2 spin, ie, a quarter spin magnetization, due to symmetrization of the real spin and the chirality. Here, we consider effects of discord between two types of inter-cluster interactions, inducing anisotropic biquadratic interactions of effective S= 1 spins. The discord brings the edge magnetization nearer to an exact value of quarter spin magnetization, whereas localization of the edge states becomes worse. These effects are also confirmed in a corresponding spin-1 model.