Ubiquitous impact of localised impurity states on the exchange coupling mechanism in magnetic topological insulators

Thiago R. F. Peixoto, Hendrik Bentmann, Philipp Rüßmann +27

Since the discovery of the quantum anomalous Hall effect in the magnetically doped topological insulators (MTI) Cr:(Bi,Sb)${}_2$Te${}_3$ and V:(Bi,Sb)${}_2$Te${}_3$, the search for the exc…