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Observation of moiré excitons in WSe2/WS2 heterostructure superlattices
Observation of distinct moiré superlattice exciton states in WSe2/WS2 heterostructures using optical spectroscopy
Significance and Impact
Moiré exciton bands provide an promising platform to realize novel excited states of matter
- Observed multiple emergent peaks around the original WSe2 exciton resonance with distinct doping dependences in aligned WSe2/WS2 heterostructures.
- The experimental phenomena can be explained using a model where the moiré potential is much stronger than the exciton kinetic energy and creates flat exciton bands.
C. Jin, E. C. Regan, A. Yan, M. I. B. Utama, D. Wang, S. Zhao, Y. Qin, S. Yang, Z. Zheng, S. Shi, K. Watanabe, T. Taniguchi, S. Tongay, A. Zettl, F. Wang. Nature (2019). doi:10.1038/s41586-019-0976-y.