AB-Stacked Multilayer Graphene Synthesized via Chemical Vapor Deposition: A Characterization by Hot Carrier Transport

作者：Diaz Pinto Carlos; De Debtanu; Hadjiev Viktor G; Peng Haibing^*

来源：ACS Nano, 2012, 6(2): 1142-1148.

DOI：10.1021/nn300326x

• multilayer graphene
• chemical vapor deposition
• AB stacking
• graphite
• hot electron transport
• nanostructure

We report the synthesis of AB-stacked multilayer graphene via ambient pressure chemical vapor deposition on Cu foils and demonstrate a method to construct suspended multilayer graphene devices. In four-terminal geometry, such devices were characterized by hot carrier transport at temperatures down to 240 mK and in magnetic fields up to 14 T. The differential conductance (dl/dv) shows a characteristic dip at longitudinal voltage bias V = 0 at low temperatures, indicating the presence of hot electron effect due to a weak electron-phonon coupling. Under magnetic fields, the magnitude of the dl/dV dip diminishes through the enhanced intra-Landau level cyclotron phonon scattering. Our results provide new perspectives in obtaining and understanding AB-stacked multilayer graphene, important for future graphene-based applications.

• 出版日期2012-2