Composite super-moiré lattices in double-aligned graphene heterostructures.

Autor:	Wang Z; Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UK., Wang YB; Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UK., Yin J; Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UK.; Institute of Nano Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China., Tóvári E; National Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, UK., Yang Y; Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UK.; National Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, UK., Lin L; National Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, UK., Holwill M; National Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, UK., Birkbeck J; National Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, UK., Perello DJ; Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UK.; National Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, UK., Xu S; Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UK.; National Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, UK., Zultak J; National Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, UK., Gorbachev RV; Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UK.; National Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, UK.; Henry Royce Institute for Advanced Materials, Oxford Road, Manchester M13 9PL, UK., Kretinin AV; National Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, UK.; Department of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, UK., Taniguchi T; National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan., Watanabe K; National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan., Morozov SV; Institute of Microelectronics Technology RAS, Chernogolovka 142432, Russia., Anđelković M; Department of Physics, University of Antwerp, Groenenborgerlaan 171, Antwerp, Belgium., Milovanović SP; Department of Physics, University of Antwerp, Groenenborgerlaan 171, Antwerp, Belgium., Covaci L; Department of Physics, University of Antwerp, Groenenborgerlaan 171, Antwerp, Belgium., Peeters FM; Department of Physics, University of Antwerp, Groenenborgerlaan 171, Antwerp, Belgium., Mishchenko A; Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UK.; National Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, UK., Geim AK; Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UK.; National Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, UK., Novoselov KS; Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UK.; National Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, UK.; Centre for Advanced 2D Materials, National University of Singapore, Singapore 117546, Singapore.; Chongqing 2D Materials Institute, Liangjiang New Area, Chongqing 400714, China., Fal'ko VI; Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UK.; National Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, UK.; Henry Royce Institute for Advanced Materials, Oxford Road, Manchester M13 9PL, UK., Knothe A; National Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, UK., Woods CR; Department of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL, UK.; National Graphene Institute, University of Manchester, Oxford Road, Manchester M13 9PL, UK.
Jazyk:	angličtina
Zdroj:	Science advances [Sci Adv] 2019 Dec 20; Vol. 5 (12), pp. eaay8897. Date of Electronic Publication: 2019 Dec 20 (Print Publication: 2019).
DOI:	10.1126/sciadv.aay8897
Abstrakt:	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, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY).)
Databáze:	MEDLINE
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