Tuning bulk topological magnon properties with light-induced magnons

Abstract

Although theoretical modelling and inelastic neutron scattering measurements have indicated the presence of topological magnon bands in multiple quantum magnets, experiments remain unable to detect signal of magnon thermal Hall effect in the quantum magnets, which is a consequence of magnons condensation at the bottom of the bands following Bose Einstein statistics as well as the concentration of Berry curvature at the higher energies. In a recent work, Malz et al.[Nature Communications 10, 3937 (2019)] have shown that topological magnons in edge states in a finite sample can be amplified using tailored electromagnetic fields. We extend their approach by showing that a uniform electromagnetic field can selectively amplify magnons with finite Berry curvature by breaking inversion symmetry of a lattice. Using this approach, we demonstrate the generation of bulk topological magnons in a Heisenberg ferromagnet on the breathing kagome lattice and the consequent amplification of thermal Hall effect.

8 pages, 4 figures

References in corpus (9)

• Topological Photonics
• Photonic Analogue of Two-dimensional Topological Insulators and Helical One-Way Edge Transport in Bi-Anisotropic Metamaterials
• Observation of the Magnon Hall Effect
• Theoretical prediction of rotating magnon wavepacket in ferromagnets
• Topological Nature of the Phonon Hall Effect
• Electronic Orbital Currents and Polarization in Mott Insulators
• Hall effect of triplons in a dimerized quantum magnet
• Haydeeite: a spin-1/2 kagome ferromagnet
• Spin-orbit coupling and electronic charge effects in Mott insulators

Cited by in corpus (4)

• Magnon Hall effect in antiferromagnetic lattices
• Magnon bands and transverse transport in a proposed two-dimensional $C{u}_2{F}_5$ ferrimagnet
• Topological phases of electrons induced by electron-magnon interactions
• Amplifying the antiferromagnetic spin Seebeck effect through topological magnons