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

机译:石墨烯器件的电流-电压特性:齐纳-克莱因隧穿与缺陷之间的相互作用

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摘要

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~α with I <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.
机译:我们报告了在Dirac点附近的石墨烯器件的电流-电压特性(I-V)的理论/实验研究。 I-V可以通过幂定律(I∝V〜α,I <α<1.5)来描述。迁移率较低时,指数较高。根据齐纳-克莱因传输(即不同能带之间的隧穿)和缺陷散射之间的相互作用来解释这种超线性I-V。出人意料的是,由于存在缺陷,齐纳-克莱因隧道效应变得可见。

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