Weyl magnons in breathing pyrochlore antiferromagnets
Weyl magnons in breathing pyrochlore antiferromagnets
Frustrated quantum magnets not only provide exotic ground states and unusual magnetic structures, but also support unconventional excitations in many cases. Using a physically relevant spin model for a breathing pyrochlore lattice, we discuss the presence of topological linear band crossings of magnons in antiferromagnets. These are the analogs of …