Observation of topologically protected states at crystalline phase boundaries in single-layer WSe2
Observation of topologically protected states at crystalline phase boundaries in single-layer WSe2
Transition metal dichalcogenide materials are unique in the wide variety of structural and electronic phases they exhibit in the two-dimensional limit. Here we show how such polymorphic flexibility can be used to achieve topological states at highly ordered phase boundaries in a new quantum spin Hall insulator (QSHI), 1T'-WSe2. We …