Breathing Mode of a Skyrmion on a Lattice
arXiv:1906.09212 · doi:10.1103/PhysRevB.101.014418
Abstract
The breathing mode of a skyrmion, corresponding to coupled oscillations of its size and chirality angle is studied numerically for a conservative classical-spin system on a lattice. The dependence of the oscillation frequency on the magnetic field is computed. It is linear at small fields, reaches maximum on increasing the field, then sharply tends to zero as the field approaches the threshold above which the skyrmion loses stability and collapses. Physically transparent analytical model is developed that explains the results qualitatively and provides the field dependence of the oscillation frequency that is close to the one computed numerically. It is shown that a large-amplitude breathing motion in which the skyrmion chirality angle is rotating in one direction is strongly damped and quickly ends by the skyrmion collapse. To the contrary, smaller-amplitude breathing motion in which oscillates is undamped.
9 PR pages, 12 figure panels
References in corpus (13)
- Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
- Additive interfacial chiral interaction in multilayers for stabilization of small individual skyrmion at room temperature
- Magnetic skyrmion logic gates: conversion, duplication and merging of skyrmions
- Skyrmions in Magnetic Multilayers
- Full phase diagram of isolated skyrmions in a ferromagnet
- Magnon-skyrmion scattering in chiral magnets
- Inertia and chiral edge modes of a skyrmion magnetic bubble
- Breathing modes of confined skyrmions in ultrathin magnetic dots
- Spin eigen-excitations of the magnetic skyrmion and problem of the effective mass
- Thermal stability of metastable magnetic skyrmions: Entropic narrowing and significance of internal eigenmodes
- Characterizing breathing dynamics of magnetic (anti-)skyrmions within the Hamiltonian formalism
- Quantum Collapse of a Magnetic Skyrmion
- Localized spin waves in isolated skyrmions