Model studies of topological phase transitions in materials with two types of magnetic atoms

Article

关键词: MEAN-FIELD-THEORY;   

DOI  :  10.1103/PhysRevB.104.235108

来源: SCIE

【 摘 要 】

We study the topological phase transitions induced by Coulomb engineering in three triangular-lattice Hubbard models, AB2, AC3, and B2C3, each of which consists of two types of magnetic atoms with opposite magnetic moments. The energy bands are calculated using the Schwinger boson method. We find that a topological phase transition can be triggered by the second-order (three-site) virtual processes between the two types of magnetic atoms, the strengths of which are controlled by the on-site Coulomb interaction U. This class of topological phase transitions has rarely been studied and may be realized in a variety of real magnetic materials.

【 授权许可】

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