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Journal Articles Physical Review B Year : 2010

Current-voltage characteristics of graphene devices: Interplay between Zener-Klein tunneling and defects

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Abstract

We report a theoretical/experimental study of current-voltage characteristics (I-V) of graphene devices near the Dirac point. The I-V can be described by a power law ( I∝Vα with 1<α≤1.5 ). The exponent is higher when the mobility is lower. This superlinear I-V is interpreted in terms of the interplay between Zener-Klein transport, that is tunneling between different energy bands, and defect scattering. Surprisingly, the Zener-Klein tunneling is made visible by the presence of defects.
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insu-03605308 , version 1 (11-03-2022)

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Attribution - CC BY 4.0

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Niels Vandecasteele, Amelia Barreiro, Michele Lazzeri, Adrian Bachtold, Francesco Mauri. Current-voltage characteristics of graphene devices: Interplay between Zener-Klein tunneling and defects. Physical Review B, 2010, 82, ⟨10.1103/PhysRevB.82.045416⟩. ⟨insu-03605308⟩
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