Current-voltage characteristics of graphene devices: interplay between Zener-Klein tunneling and defects
Materials Science
2015-05-18 v1 Mesoscale and Nanoscale Physics
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 \propto V^\alpha, with 1< \alpha <= 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.
Keywords
Cite
@article{arxiv.1003.2072,
title = {Current-voltage characteristics of graphene devices: interplay between Zener-Klein tunneling and defects},
author = {Niels Vandecasteele and Amelia Barreiro and Michele Lazzeri and Adrian Bachtold and Francesco Mauri},
journal= {arXiv preprint arXiv:1003.2072},
year = {2015}
}
Comments
5 pages, 3 figures