Abstract

Three-dimensional (3D) deformation of two-dimensional materials offers a route toward band structure engineering. In the case of graphene, a spatially nonuniform deformation and strain are known to generate an effective magnetic field, i.e., a pseudomagnetic field, although experimental realization of this effect in electronic devices has been challenging. Here, we engineer the 3D deformation profile of graphene to create a strain superlattice and study the resultant magnetotransport behavior both experimentally and via quantum transport simulations. We observe a weakening of superlattice features as we increase the magnetic field, which we find to be consistent with competing interactions between the external magnetic field and the strain-induced pseudomagnetic field. Our results demonstrate that strain superlattices are promising platforms to modulate the band structure and engineer the electronic transport behavior in graphene.

Original languageEnglish (US)
Article number143508
JournalApplied Physics Letters
Volume115
Issue number14
DOIs
StatePublished - Sep 30 2019

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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