Chiral edge plasmons in quantum anomalous Hall insulators
Chiral edge plasmons in quantum anomalous Hall insulators
We find that the Berry curvature splits the edge plasmons propagating along the opposite directions in quantum anomalous Hall insulators even with vanishing Chern number. When the bulk is insulating, only one unidirectional edge plasmon mode survives whose direction can be changed by external fields. The unidirectional edge plasmon in …