Electrical detection of spin precession in single layer graphene spin valves with transparent contacts
Electrical detection of spin precession in single layer graphene spin valves with transparent contacts
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DOI：
10.1063/1.3147203
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发表时间：
2009-06-01
影响因子：
4
通讯作者：
Kawakami, R. K.
中科院分区：
文献类型：
--
作者：
Han, Wei;Pi, K.;Kawakami, R. K.
利用非局域自旋阀方法研究了室温下单层石墨烯中的自旋积累和自旋旋进。的非局域磁电阻对电极间距的依赖关系进行了研究，结果表明，自旋扩散长度类似于1.6 μ m和自旋注入/检测效率为0.013。自旋进动的电检测证实了非局域信号来源于自旋注入和输运。拟合的Hanle自旋进动数据产生类似于84 ps的自旋弛豫时间和类似于1.5 μ m的自旋扩散长度，这与通过间距依赖性获得的值一致。
Spin accumulation and spin precession in single layer graphene are studied by nonlocal spin valve measurements at room temperature. The dependence of the nonlocal magnetoresistance on electrode spacing is investigated and the results indicate a spin diffusion length of similar to 1.6 mu m and a spin injection/detection efficiency of 0.013. Electrical detection of the spin precession confirms that the nonlocal signal originates from spin injection and transport. Fitting of the Hanle spin precession data yields a spin relaxation time of similar to 84 ps and a spin diffusion length of similar to 1.5 mu m, which is consistent with the value obtained through the spacing dependence.