Electrical detection of spin precession in single layer graphene spin valves with transparent contacts

• DOI: 10.1063/1.3147203
• Publication Date: 2009-06-03T22:18:37Z
• Authors: Wei Han; K. Pi; W. Bao; K. M. McCreary; Yan Li; W. H. Wang; C. N. Lau; R. K. Kawakami
• Keywords: Spin diffusion; Spin valve; Precession; Spinplasmonics

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