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Rodney S. Ruoff
다차원 탄소재료 연구단
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Breaking of Symmetry in Graphene Growth on Metal Substrates

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Title
Breaking of Symmetry in Graphene Growth on Metal Substrates
Author(s)
Artyukhov, VI; Hao, YF; Rodney S. Ruoff; Yakobson, BI
Publication Date
2015-03
Journal
PHYSICAL REVIEW LETTERS, v.114, no.11, pp.115502 -
Publisher
AMER PHYSICAL SOC
Abstract
In graphene growth, island symmetry can become lower than the intrinsic symmetries of both graphene and the substrate. First-principles calculations and Monte Carlo modeling explain the shapes observed in our experiments and earlier studies for various metal surface symmetries. For equilibrium shape, edge energy variations delta E manifest in distorted hexagons with different ground-state edge structures. In growth or nucleation, energy variation enters exponentially as similar to e(delta E/kBT), strongly amplifying the symmetry breaking, up to completely changing the shapes to triangular, ribbonlike, or rhombic
URI
http://pr.ibs.re.kr/handle/8788114/1706
DOI
10.1103/PhysRevLett.114.115502
ISSN
0031-9007
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > Journal Papers (저널논문)
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