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Title: Composite super-moiré lattices in double-aligned graphene heterostructures
Authors: Wang, Z.
Wang, Y.B.
Yin, J.
Tóvári, E.
Yang, Y.
Lin, L.
Holwill, M.
Birkbeck, J.
Perello, D.J.
Xu, S.
Zultak, J.
Gorbachev, R.V.
Kretinin, A.V.
Taniguchi, T.
Watanabe, K.
Morozov, S.V.
An?elkovi?, M.
Milovanovi?, S.P.
Covaci, L.
Peeters, F.M.
Mishchenko, A.
Geim, A.K.
Novoselov, K.S. 
Fal’ko, V.I.
Knothe, A.
Woods, C.R.
Issue Date: 2019
Publisher: American Association for the Advancement of Science
Citation: Wang, Z., Wang, Y.B., Yin, J., Tóvári, E., Yang, Y., Lin, L., Holwill, M., Birkbeck, J., Perello, D.J., Xu, S., Zultak, J., Gorbachev, R.V., Kretinin, A.V., Taniguchi, T., Watanabe, K., Morozov, S.V., An?elkovi?, M., Milovanovi?, S.P., Covaci, L., Peeters, F.M., Mishchenko, A., Geim, A.K., Novoselov, K.S., Fal’ko, V.I., Knothe, A., Woods, C.R. (2019). Composite super-moiré lattices in double-aligned graphene heterostructures. Science Advances 5 (12) : eaay8897. ScholarBank@NUS Repository.
Rights: Attribution-NonCommercial 4.0 International
Abstract: When two-dimensional (2D) atomic crystals are brought into close proximity to form a van der Waals heterostructure, neighbouring crystals may influence each other’s properties. Of particular interest is when the two crystals closely match and a moiré pattern forms, resulting in modified electronic and excitonic spectra, crystal reconstruction, and more. Thus, moiré patterns are a viable tool for controlling the properties of 2D materials. However, the difference in periodicity of the two crystals limits the reconstruction and, thus, is a barrier to the low-energy regime. Here, we present a route to spectrum reconstruction at all energies. By using graphene which is aligned to two hexagonal boron nitride layers, one can make electrons scatter in the differential moiré pattern which results in spectral changes at arbitrarily low energies. Further, we demonstrate that the strength of this potential relies crucially on the atomic reconstruction of graphene within the differential moiré super cell. Copyright © 2019 The Authors
Source Title: Science Advances
ISSN: 2375-2548
DOI: 10.1126/sciadv.aay8897
Rights: Attribution-NonCommercial 4.0 International
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