Tuning commensurability in twisted van Der Waals (vdW) bilayers
- Using scanning tunneling microscopy spectroscopy (STM/S), the 30° twisted bilayer WSe2 moiré quasicrystals and 21.8° twisted bilayer WSe2 moiré crystals are studied.
- This study reveals the rich electronic structures in large angle twisted bilayer WSe2 exemplified by the formation of multiple mini-gaps near the valence band maximum.
- This work provides a proof of concept for using large-twist-angle vdW structures as a design platform to study quasicrystals with tunable commensurability, a feature unavailable in traditional quasicrystals.
- Understanding quasicrystal properties allow the team to explore complex vdW heterostructures beyond a single moiré, a key goal of the IRG 2
