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- W2994887029 abstract "We describe a new regime of magnetotransport in two-dimensional electron systems in the presence of a narrow potential barrier. In such systems, the Landau level states, which are confined to the barrier region in strong magnetic fields, undergo a deconfinement transition as the field is lowered. Transport measurements on a top-gated graphene device are presented. Shubnikov-de Haas (SdH) oscillations, observed in the unipolar regime, are found to abruptly disappear when the strength of the magnetic field is reduced below a certain critical value. This behavior is explained by a semiclassical analysis of the transformation of closed cyclotron orbits into open, deconfined trajectories." @default.
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- W2994887029 date "2011-02-01" @default.
- W2994887029 modified "2023-10-16" @default.
- W2994887029 title "Collapse of Landau Levels in Gated Graphene Structures" @default.
- W2994887029 hasPublicationYear "2011" @default.
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