STM images of WSe2 show the valence-band electron density shift from tungsten sites near Gamma to hollow sites near K, confirming WSe2 is a topologically obstructed atomic insulator.
Boundary-obstructed topological phases,
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Real-Space Imaging of the Band Topology of Transition Metal Dichalcogenides
STM images of WSe2 show the valence-band electron density shift from tungsten sites near Gamma to hollow sites near K, confirming WSe2 is a topologically obstructed atomic insulator.