Strain engineering of bilayer graphene with spatially corrugated domain*

Nanostructural engineering pave an crucial routes to realize artificial band structures, superlattices and spectrum [1,2,3]. Graphene, which is one of the most attractive materials, can be spatially deformed to induce a strain gauge field, which opens a novel topic named “straintronics” [4]. Here, we develop a method to locally engineer the bilayer graphene in a corrugated pattern such that we can simultaneously investigate and compare the flat and corrugated regions in the same bilayer graphene device. Unconventional negative magnetoresistance (MR) is observed in corrugated region when an in-plane magnetic field is applied. Such negative MR is further studied as a function of temperature and carrier density.

References
1. C. Forsythe, et al. arXiv 1710.01365 (2017).
2. C. R. Dean, et al. Nature 497, 598 (2013).
3. Y. Zhang, et al. arXiv 1703.05689 (2017).
4. B. Amorim, et al. Phys. Rep. 617, 1 (2016).