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

Abstract

We study the topological phase transitions induced by Coulomb engineering in three triangular-lattice Hubbard models $A{B}_2$, $A{C}_3$ and $B_2{C}_3$, 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 new class of topological phase transitions have been rarely studied and may be realized in a variety of real magnetic materials.

8 pages, 6 figures

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Cited by in corpus (2)

• Tuning the magnetic anisotropy and topological phase with electronic correlation in single-layer H-FeBr${}_2$
• Exploration of the two-dimensional Ising magnetic materials in the triangular prismatic crystal field