Tunable magnon topology in monolayer CrI${}_3$ under external stimuli

Abstract

Two-dimensional (2D) honeycomb ferromagnets, such as monolayer chromium-trihalides, are predicted to behave as topological magnon insulators - characterized by an insulating bulk and topologically protected edge states, giving rise to a thermal magnon Hall effect. Here we report the behavior of the topological magnons in monolayer CrI${}_3$ under external stimuli, including biaxial and uniaxial strain, electric gating, as well as in-plane and out-of-plane magnetic field, revealing that one can thereby tailor the magnetic states as well as the size and the topology of the magnonic bandgap. These findings broaden the perspective of using 2D magnetic materials to design topological magnonic devices.

References in corpus (10)

• Observation of the Magnon Hall Effect
• Magnetic field effect on topological spin excitations in CrI${}_3$
• Topological magnon insulator spin excitations in the two-dimensional ferromagnet CrBr${}_3$
• Distinctive magnetic properties of CrI3 and CrBr3 monolayers caused by spin-orbit coupling
• The interplay of Dzyaloshinskii-Moriya and Kitaev interactions for magnonic properties of Heisenberg-Kitaev honeycomb ferromagnets
• Massless Dirac magnons in the two dimensional van der Waals honeycomb magnet CrCl3
• Stacking-dependent topological magnons in bilayer CrI${}_3$
• Topological phase transition in magnon bands in a honeycomb ferromagnet driven by sublattice symmetry breaking
• First-principles study of the gap in the spin excitation spectrum of the CrI${}_3$ honeycomb ferromagnet
• Tailoring High-Frequency Magnonics in Monolayer Chromium Trihalides

Cited by in corpus (7)

• Topological magnon gap engineering in van der Waals CrI${}_3$ ferromagnets
• Strain-tunable magnetic and magnonic states in Ni-dihalide monolayers
• Intrinsic Spin Nernst Effect and Chiral Edge Modes in van der Waals Ferromagnetic Insulators: Dzyaloshinskii-Moriya vs. Kitaev Interactions
• Magnon dispersion and spin transport in CrCl${}_3$ bilayers under different strain-induced magnetic states
• Topological magnon-polaron transport in a bilayer van der Waals magnet
• Topological switching in bilayer magnons via electrical control
• Topological Magnetic Phases and Magnon-Phonon Hybridization in the Presence of Strong Dzyaloshinskii-Moriya Interaction