Pressure-induced commensurate stacking of graphene on boron nitride
AffiliationUniv Arizona, Dept Phys
MetadataShow full item record
PublisherNATURE PUBLISHING GROUP
CitationPressure-induced commensurate stacking of graphene on boron nitride 2016, 7:13168 Nature Communications
Rights© The Author(s) 2016. This work is licensed under a Creative Commons Attribution 4.0 International License.
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AbstractCombining atomically-thin van der Waals materials into heterostructures provides a powerful path towards the creation of designer electronic devices. The interaction strength between neighbouring layers, most easily controlled through their interlayer separation, can have significant influence on the electronic properties of these composite materials. Here, we demonstrate unprecedented control over interlayer interactions by locally modifying the interlayer separation between graphene and boron nitride, which we achieve by applying pressure with a scanning tunnelling microscopy tip. For the special case of aligned or nearly-aligned graphene on boron nitride, the graphene lattice can stretch and compress locally to compensate for the slight lattice mismatch between the two materials. We find that modifying the interlayer separation directly tunes the lattice strain and induces commensurate stacking underneath the tip. Our results motivate future studies tailoring the electronic properties of van der Waals heterostructures by controlling the interlayer separation of the entire device using hydrostatic pressure.
VersionFinal published version
SponsorsU.S. Army Research Laboratory; U.S. Army Research Office [W911NF-14-1-0653]; National Science Foundation [DMR-0953784]; Spanish Ministry of Economy and Innovation [FIS2011-23713]; Ramon y Cajal programme [RYC-2013-14645]
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