1. Electric Property Evolution of Structurally Defected Multilayer Graphene
- Author
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Hyung Ju Park, Kanghyun Kim, Gyu Tae Kim, Wan Soo Yun, Byung-Chill Woo, and Kook Jin Kim
- Subjects
Materials science ,Condensed matter physics ,Graphene ,Carrier scattering ,Mechanical Engineering ,Transconductance ,Conductance ,Bioengineering ,General Chemistry ,Condensed Matter Physics ,Noise (electronics) ,Variable-range hopping ,law.invention ,law ,Percolation ,General Materials Science ,Electrical conductor - Abstract
We report on the influence of structural disorder on the electrical properties of multilayer graphene (MLG). Exponential decreases in the conductance and transconductance with increase of defects in the MLG were observed, which could be explained by the percolation and the variable range hopping conduction. An enhancement of p-type nature with increasing disorders was considered to be the result of oxygen doping in the graphene sheets introduced by oxygen plasma. The rapid increase of low-frequency noise was attributed to the formation of conductive network through the continuum percolation, as the low-frequency noise could be increased by the enhanced carrier scattering at the defect sites. We hope that our result should suggest a simple method of tuning the electrical properties of graphene.
- Published
- 2008
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