Mixed topological semimetals driven by orbital complexity in two-dimensional ferromagnets

Abstract

The concepts of Weyl fermions and topological semimetals emerging in three-dimensional momentum space are extensively explored owing to the vast variety of exotic properties that they give rise to. On the other hand, very little is known about semimetallic states emerging in two-dimensional magnetic materials, which present the foundation for both present and future information technology. Here, we demonstrate that including the magnetization direction into the topological analysis allows for a natural classification of topological semimetallic states that manifest in two-dimensional ferromagnets as a result of the interplay between spin-orbit and exchange interactions. We explore the emergence and stability of such mixed topological semimetals in realistic materials, and point out the perspectives of mixed topological states for current-induced orbital magnetism and current-induced domain wall motion. Our findings pave the way to understanding, engineering and utilizing topological semimetallic states in two-dimensional spin-orbit ferromagnets.

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Cited by in corpus (17)

• Orbitronics: Orbital Currents in Solids
• Orbital angular momentum of Bloch electrons: equilibrium formulation, magneto-electric phenomena, and the orbital Hall effect
• The chiral Hall effect in canted ferromagnets and antiferromagnets
• Imprinting and driving electronic orbital magnetism using magnons
• Topological responses from gapped Weyl points in 2D altermagnets
• Two-dimensional topological semimetal states in monolayers Cu${}_2$Ge, Fe${}_2$Ge, and Fe${}_2$Sn
• Orbital Edelstein effect from density-wave order
• Abundant surface-semimetal phases in three-dimensional obstructed atomic insulators
• Promoting $p$-based Hall effects by $p$-$d$-$f$ hybridization in Gd-based dichalcogenides
• Spanning Fermi arcs in a two-dimensional magnet
• Enhanced Ferromagnetism in Monolayer Cr2Te3 via Topological Insulator Coupling
• Orbital Gravito-Magnetoelectric response and Orbital magnetic quadrupole moment correction
• Giant anisotropy of Gilbert damping in a Rashba honeycomb antiferromagnet
• Mixed topology ring states for Hall effect and orbital magnetism in skyrmions of Weyl semimetals
• Controlling topology through targeted composite symmetry manipulation in magnetic systems
• Scanning Tunneling Microscopy Study of Epitaxial Fe3GeTe2 Monolayers on Bi2Te3
• Thermal Responses of Spin Density and Spin Current Induced by Bogoliubov Fermi Surfaces in Proximity Superconductors