• 文献标题:   Current-based detection of nonlocal spin transport in graphene for spin-based logic applications
  • 文献类型:   Article, Proceedings Paper
  • 作  者:   WEN H, ZHU TC, LUO YQ, AMAMOU W, KAWAKAMI RK
  • 作者关键词:  
  • 出版物名称:   JOURNAL OF APPLIED PHYSICS
  • ISSN:   0021-8979 EI 1089-7550
  • 通讯作者地址:   Univ Calif Riverside
  • 被引频次:   5
  • DOI:   10.1063/1.4868084
  • 出版年:   2014

▎ 摘  要

Graphene has been proposed for novel spintronic devices due to its robust and efficient spin transport properties at room temperature. Some of the most promising proposals require current-based readout for integration purposes, but the current-based detection of spin accumulation has not yet been developed. In this work, we demonstrate current-based detection of spin transport in graphene using a modified nonlocal geometry. By adding a variable shunt resistor in parallel to the nonlocal voltmeter, we are able to systematically cross over from the conventional voltage-based detection to current-based detection. As the shunt resistor is reduced, the output current from the spin accumulation increases as the shunt resistance drops below a characteristic value R*. We analyze this behavior using a one-dimensional drift-diffusion model, which accounts well for the observed behavior. These results provide the experimental and theoretical foundation for current-based detection of nonlocal spin transport. (C) 2014 AIP Publishing LLC.