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Tuning Anti-Klein to Klein Tunneling in Bilayer Graphene

Du, Renjun ; Liu, Ming-Hao ; Mohrmann, Jens ; Wu, Fan ; Krupke, Ralph ; von Löhneysen, Hilbert ; Richter, Klaus ; Danneau, Romain


We show that in gapped bilayer graphene, quasiparticle tunneling and the corresponding Berry phase can be controlled such that they exhibit features of single-layer graphene such as Klein tunneling. The Berry phase is detected by a high-quality Fabry-Perot interferometer based on bilayer graphene. By raising the Fermi energy of the charge carriers, we find that the Berry phase can be continuously ...


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