New Exiton Species Discovered (IMAGE)

University of Texas at Austin, Texas Advanced Computing Center

New Exiton Species Discovered

Caption

Scientists have discovered a new kind of quasiparticle called an intralayer charge-transfer exciton, consisting of an electron and an electron hole separated in a characteristic distance, in a moiré superlattice formed by stacking one 2D layer of the material transition metal dichalcogenide on top of another with a slight twist. Rotationally aligned WSe2/WS2 heterostructure with the superlattice cell outlined in black and the high-symmetry positions labeled.

Credit

Naik, M.H., Regan, E.C., Zhang, Z. et al. DOI: 10.1038/s41586-022-04991-9

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