Electric property evolution of structurally defected multilayer graphene.
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.
Kim
Kanghyun
K
Division of Advanced Technology, Korea Research Institute of Standards and Science, Daejeon 305-340, Korea.
Park
Hyung Ju
HJ
Woo
Byung-Chill
BC
Kim
Kook Jin
KJ
Kim
Gyu Tae
GT
Yun
Wan Soo
WS