Evidence of Local Commensurate State with Lattice Match of Graphene on Hexagonal Boron Nitride

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Title
Evidence of Local Commensurate State with Lattice Match of Graphene on Hexagonal Boron Nitride
Author(s)
Na Yeon Kim; Hu Young Jeong; Jung Hwa Kim; Gwangwoo Kim; Hyeon Suk Shin; Zonghoon Lee
Publication Date
2017-07
Journal
ACS NANO, v.11, no.7, pp.7084 - 7090
Publisher
AMER CHEMICAL SOC
Abstract
Transition to a commensurate state changes the local symmetry periodicity on two-dimensional van der Waals superstructures, evoking distinctive properties far beyond individual layers. We investigate the morphology of moiré superstructures of graphene on hexagonal boron nitride (hBN) with a low twist angle (≈0°) through moiré fringe analyses with dark field transmission electron microscopy. The moiré fringes exhibit local variation, suggesting that the interaction between graphene and hBN depends on the stacking configuration and that local transition to the commensurate state occurs through the reduced crystalline mismatch (that is, by lattice stretching and twisting on the graphene lattices). This moiré superstructure analysis suggests an inventive method for studying the interaction between stacked van der Waals layers and for discerning the altered electronic and optical properties of graphene on hBN superstructures with a low twist angle, even at low magnification. © 2017 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/4029
ISSN
1936-0851
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Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > Journal Papers (저널논문)
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