Lattice mismatch induced ripples and wrinkles in planar graphene/boron nitride superlattices

Journal Article · Sun Jun 21 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4922504· OSTI ID:22412945

Nandwana, Dinkar ^[1]; Ertekin, Elif ^[1]

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1. Department of Mechanical Science and Engineering, University of Illinois at Urbana–Champaign, Urbana, Illinois 61801 (United States)

A continuum theory to describe periodic ripple formation in planar graphene/boron nitride superlattices is formulated. Due to the lattice mismatch between the two materials, it is shown that flat superlattices are unstable with respect to ripple formation of appropriate wavelengths. A competition between bending energy and transverse stretching energy gives rise to an optimal ripple wavelength that depends on the superlattice pitch. The optimal wavelengths predicted by the continuum theory are in good agreement with atomic scale total energy calculations previously reported by Nandwana and Ertekin [Nano Lett. 15, 1468 (2015)].

• OSTI ID: 22412945
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 23; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BORON NITRIDES
CRYSTAL DEFECTS
GRAPHENE
INTERFACES
PERIODICITY
SUPERLATTICES