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arXiv · 0905.4701

Electrical Detection of Spin Precession in Single Layer Graphene Spin Valves with Transparent Contacts

Wei Han·K. Pi·W. Bao·K. M. McCreary·Yan Li·W. H. Wang·C. N. Lau·R. K. Kawakami
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Abstract

Spin accumulation and spin precession in single-layer graphene are studied by non-local spin valve measurements at room temperature. The dependence of the non-local magnetoresistance on electrode spacing is investigated and the results indicate a spin diffusion length of ~1.6 microns and a spin injection/detection efficiency of 0.013. Electrical detection of the spin precession confirms that the non-local signal originates from spin injection and transport. Fitting of the Hanle spin precession data yields a spin relaxation time of ~84 ps and a spin diffusion length of ~1.5 microns, which is consistent with the value obtained through the spacing dependence.

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Wei Han, K. Pi, W. Bao, K. M. McCreary, Yan Li, W. H. Wang, C. N. Lau, R. K. Kawakami. 2009-05-29. Electrical Detection of Spin Precession in Single Layer Graphene Spin Valves with Transparent Contacts. https://doi.org/10.1063/1.3147203

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