Spin Inertia as a Source of Topological Magnons: Chiral Edge States from Coupled Precession and Nutation

Session Information

Location: amf. P7 | "Gheorghe Asachi" Technical University of Iași (TUIAȘI)
Day: 3. Wednesday 17
Time: 14:50-15:10
Chairperson: Krisztian Palotas

Presentation Details

Presentation Type: Oral presentation
Title: Spin Inertia as a Source of Topological Magnons: Chiral Edge States from Coupled Precession and Nutation
Abstract: Spin inertia has been demonstrated to give rise to high-frequency nutational excitations beyond the conventional low-frequency precessional modes. Here, we demonstrate that the hybridization between precessional and nutational magnons may give rise to topological phenomena in the spin-wave spectrum. This hybridization requires the presence of interactions breaking angular-momentum conservation, such as the pseudodipolar interaction. We show on the example of a honeycomb ferromagnet how topological gaps open between the precessional and nutational bands that host chiral edge states in slab geometries. Our work establishes a theoretical foundation for exploring inertial spin dynamics as a new route to engineer topological phases in magnetic materials.

Presenter

Dr Levente Rózsa
HUN-REN Wigner Research Centre for Physics | Hungary

Authors

1. Rózsa, Levente | HUN-REN Wigner Research Centre for Physics