Current-voltage characteristics of graphene devices: Interplay between Zener-Klein tunneling and defects
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چکیده
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 V with 1 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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تاریخ انتشار 2010