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- W2964080232 abstract "Monolayer graphene and bilayer graphene have strikingly different properties. One such difference is the shape of the Fermi surface. Although anisotropic band structures can be detected in optical measurements, they have so far been difficult to detect in transport experiments on two-dimensional materials. Here we describe a ballistic transport experiment using high-quality graphene that revealed Fermi surface anisotropy in the magnetoresistance. The shape of the Fermi surface is closely related with the cyclotron orbit in real space. Electron trajectories in samples with triangular lattices of holes depend on the anisotropy of the Fermi surface. We found that this results in magnetoresistance that is dependent on crystallographic orientation of the antidot lattice, which indicates the anisotropic Fermi surface of bilayer graphene that is a trigonally warped circle in shape. While in the monolayer, the shape of magnetoresistance was approximately independent of the orientation of antidot lattice, which indicates that the Fermi surface is a circle in shape. The ballistic transport experiment is a different method of detecting anisotropic electronic band structures in two-dimensional electron systems." @default.
- W2964080232 created "2019-07-30" @default.
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- W2964080232 date "2019-01-29" @default.
- W2964080232 modified "2023-09-26" @default.
- W2964080232 title "Ballistic transport experiment detects Fermi surface anisotropy of graphene" @default.
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- W2964080232 doi "https://doi.org/10.1103/physrevb.99.035440" @default.
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