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Ruoff, Rodney S.
Center for Multidimensional Carbon Materials (CMCM)
Research Interests
  • Next generation carbons, ultrathin sp3-bonded carbon sheets, negative curvature (‘Schwartzites’) carbons, sp3/sp2 hybrid carbon materials, model compounds for novel carbon materials, reaction mechanisms

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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
Artyukhov, Vasilii I.Hao, YufengRuoff, Rodney S.Yakobson, Boris I.
Issue Date
2015-03
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.114, no.11, pp.1 - 6
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 δE manifest in distorted hexagons with different ground-state edge structures. In growth or nucleation, energy variation enters exponentially as ∼eδE/kBT, strongly amplifying the symmetry breaking, up to completely changing the shapes to triangular, ribbonlike, or rhombic. © 2015 American Physical Society
URI
https://scholarworks.unist.ac.kr/handle/201301/11289
URL
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.114.115502
DOI
10.1103/PhysRevLett.114.115502
ISSN
0031-9007
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CHM_Journal Papers
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