电阻率和电导率
石墨烯
电流(流体)
材料科学
电接点
流量(数学)
凝聚态物理
纳米技术
机械
复合材料
物理
电气工程
热力学
工程类
作者
Kosuke Nagashio,Tomonori Nishimura,Koji Kita,Akira Toriumi
摘要
The contact properties between metal and graphene were examined. The electrical measurement on a multiprobe device with different contact areas revealed that the current flow preferentially entered graphene at the edge of the contact metal. The analysis using the cross-bridge Kelvin structure (CBK) suggested that a transition from the edge conduction to area conduction occurred for a contact length shorter than the transfer length of ~1 micron. The contact resistivity for Ni was measured as ~5*10-6 Ohmcm2 using the CBK. A simple calculation suggests that a contact resistivity less than 10-9 Ohmcm2 is required for miniaturized graphene field effect transistors.
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