Topological properties of magnetically ordered heavy-fermion systems in the presence of mirror symmetry

Abstract

We explore topological states with magnetic order in heavy-fermion systems by taking account of a mirror symmetry.Although without spatial symmetry, there is no topological phase in the two-dimensional (2D) antiferromagnetic phases at half filling, we demonstrate that a topological phase emerges in the presence of mirror symmetry.This is explicitly shown for a two-dimensional periodic Anderson model.Furthermore, our analysis around quarter filling shows that a half-metallic state emerges in the ferromagnetic phase, where a spin-selective gap opens, resulting in nontrivial properties characterized by a Chern number.In contrast to the previously proposed models, our scenario can apply even for spin nonconserving systems in the presence of spin-orbit coupling.

10 pages, 11 figures

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Cited by in corpus (5)

• Impact of the Rashba Spin Orbit Coupling on $f$-electron Materials
• Fragility of the Kondo insulating gap against disorder: relevance to recent puzzles in topological Kondo insulators
• ${\mathcal{Z}}_2$ classification for a novel antiferromagnetic topological insulating phase in three-dimensional topological Kondo insulator
• Correlation Induced Magnetic Topological Phases in Mixed-Valence Compound SmB6
• Reflection-Symmetry Protected Antiferromagnetic Topological Insulator in Three-Dimensional Heavy-Fermion Systems