Topological Order in an Antiferromagnetic Tetratic Phase,Physical Review Letters

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Topological Order in an Antiferromagnetic Tetratic Phase
Physical Review Letters ( IF 8.1 ) Pub Date : 2022-06-23 , DOI: 10.1103/physrevlett.128.255501
Daniel Abutbul ₁ , Daniel Podolsky ₁

Affiliation

We study lattice melting in two-dimensional systems of spinful particles that interact antiferromagnetically. We argue that, for strong spin interactions, single lattice dislocations are forbidden by magnetic frustration. This leads to a melting scenario in which a tetratic phase, containing free dislocation pairs and bound disclinations, separates the solid from the liquid. We demonstrate this phase numerically in a system of hard spheres confined between parallel plates, where spins are represented by the heights of the spheres. In the tetratic phase, the spins are shown to be as antiferromagnetically ordered as allowed by their spatial configuration.

中文翻译：

反铁磁四相中的拓扑序

我们研究了反铁磁相互作用的自旋粒子的二维系统中的晶格熔化。我们认为，对于强自旋相互作用，磁挫折会禁止单晶格位错。这导致了一种熔化情况，其中包含自由位错对和束缚向错的四相将固体与液体分离。我们在限制在平行板之间的硬球系统中以数值方式证明了这一阶段，其中自旋由球体的高度表示。在四相中，自旋被证明是其空间配置所允许的反铁磁有序。

更新日期：2022-06-23

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