Abstract
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)].
Original language | English (US) |
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Article number | 234304 |
Journal | Journal of Applied Physics |
Volume | 117 |
Issue number | 23 |
DOIs | |
State | Published - Jun 21 2015 |
ASJC Scopus subject areas
- General Physics and Astronomy