Articulo
Topological spin waves in the atomic-scale magnetic skyrmion crystal
Fecha
2016Registro en:
1150072
WOS:000375479200001
Institución
Resumen
We study the spin waves of the triangular skyrmion crystal that emerges in a two-dimensional spin lattice model as a result of the competition between Heisenberg exchange, Dzyalonshinkii-Moriya interactions, Zeeman coupling and uniaxial anisotropy. The calculated spin wave bands have a finite Berry curvature that, in some cases, leads to non-zero Chern numbers, making this system topologically distinct from conventional magnonic systems. We compute the edge spin-waves, expected from the bulk-boundary correspondence principle, and show that they are chiral, which makes them immune to elastic backscattering. Our results illustrate how topological phases can occur in self-generated emergent superlattices at the mesoscale. Keywords. Author Keywords:topological magnonics skyrmion lattice spin waves
KeyWords Plus:FERROMAGNET LATTICE STATES CHIRALITY DYNAMICS PHASE