高频,缩放的石墨烯晶体管在类似钻石的碳上
Yanqing Wu1, Yu-ming Lin, Ageeth A Bol
1IBM Thomas J. Watson Research Center, Yorktown Heights, New York 10598, USA.
Nature
|April 9, 2011
概括
研究人员开发了有史以来最短的石墨烯射频 (r.f.) 晶体管 (40纳米) 的使用. 这些设备在室温和冷温度下表现出色,为下一代电子产品铺平了道路.
科学领域:
- 材料科学 材料科学 材料科学
- 电气工程 电气工程
- 纳米技术纳米技术
背景情况:
- 石墨烯表现出高载体流动性和和速度,使其成为高性能电子产品的前景.
- 化学蒸汽沉积 (CVD) 能够实现大规模,高质量的石墨烯合成.
- CVD石墨烯射频 (r.f.) 的缩放行为. 晶体管是未被充分探索的.
研究的目的:
- 系统地研究顶级CVD石墨烯r.f.的缩放行为. 晶体管. 晶体管. 晶体管. 这些都是
- 为了探索这些晶体管在缩小的网关长度上的性能.
- 为了评估石墨烯r.f.的冷性能. 晶体管. 晶体管. 晶体管. 这些都是
主要方法:
- 在铜上通过化学蒸汽沉积 (CVD) 合成石墨烯.
- 将CVD石墨烯转移到类似钻石的碳基板上.
- 制造和表征顶端通道的r.f. 晶体管的网关长度低至40 nm.
- 测试设备在室温和冷温度 (低至4.3K) 的性能.
主要成果:
- 证明了CVD石墨烯r.f.最短的网关长度 (40nm). 晶体管. 晶体管. 晶体管. 这些都是
- 在40nm晶体管中达到高达155 GHz的切断频率.
- 观察到切断频率与门长相反比例 (1/门长).
- 石墨烯 r.f. 的使用. 晶体管在冷温度下显示出最小的性能降解,与传统设备不同.
结论:
- 这项研究成功地缩小了CVD石墨烯r.f. 晶体管到40nm,实现高切断频率.
- 切断频率和门长度之间的反向缩放关系得到证实.
- 石墨烯晶体管在冷温度下提供卓越的操作稳定性,扩大了它们的应用潜力.
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