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Title
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Graphene on hexagonal lattice substrate : stress and pseudo-magnetic field
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Author
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Abstract
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| Moire patterns in the pseudo-magnetic field and in the strain profile of graphene (GE) when put on top of a hexagonal lattice substrate are predicted from elasticity theory. The van der Waals interaction between GE and the substrate induces out-of-plane deformations in graphene which results in a strain field, and consequently in a pseudo-magnetic field. When the misorientation angle is about 0.5 degrees, a three-fold symmetric strain field is realized that results in a pseudo-magnetic field very similar to the one proposed by F. Guinea, M. I. Katsnelson, and A. K. Geim [Nature Phys. 6, 30 (2010)]. Our results show that the periodicity and length of the pseudo-magnetic field can be tuned in GE by changing the misorientation angle and substrate adhesion parameters and a considerable energy gap (23 meV) can be obtained due to out-of-plane deformation of graphene which is in the range of recent experimental measurements (20-30 meV). (C) 2014 AIP Publishing LLC. |
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Language
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English
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Source (journal)
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Applied physics letters / American Institute of Physics. - New York, N.Y., 1962, currens
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Publication
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New York, N.Y.
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American Institute of Physics
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2014
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ISSN
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0003-6951
[print]
1077-3118
[online]
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DOI
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10.1063/1.4873342
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Volume/pages
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104
:17
(2014)
, 5 p.
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Article Reference
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173106
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ISI
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000336142500066
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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