title: Inertia and chiral edge modes of a Skyrmion magnetic bubble.
abstract: The dynamics of a vortex in a thin-film ferromagnet resembles the motion of a charged massless particle in a uniform magnetic field. Similar dynamics is expected for other magnetic textures with a nonzero Skyrmion number. However, recent numerical simulations reveal that Skyrmion magnetic bubbles show significant deviations from this model. We show that a Skyrmion bubble possesses inertia and derive its mass from the standard theory of a thin-film ferromagnet. In addition to center-of-mass motion, other low energy modes are waves on the edge of the bubble traveling with different speeds in opposite directions.
authors.affiliation: Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA.
authors.forename: Imam
authors.initials: I
authors.lastname: Makhfudz
authors.forename: Benjamin
authors.initials: B
authors.lastname: Krüger
authors.forename: Oleg
authors.initials: O
authors.lastname: Tchernyshyov
mesh_terms: D008280:Magnetics; D059346:Magnets / Q000737:chemistry*; D008962:Models, Theoretical