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

被引：117

作者：

Han, Wei ^{[1
]}

Pi, K. ^{[1
]}

Bao, W. ^{[1
]}

McCreary, K. M. ^{[1
]}

Li, Yan ^{[1
]}

Wang, W. H. ^{[1
]}

Lau, C. N. ^{[1
]}

Kawakami, R. K. ^{[1
]}

机构：

[1] Univ Calif Riverside, Dept Phys & Astron, Riverside, CA 92521 USA

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 22期

基金：

美国国家科学基金会;

关键词：

graphene; magnetoelectronics; magnetoresistance; spin dynamics; spin polarised transport; spin valves; INJECTION; TRANSPORT; PHASE; METAL;

D O I：

10.1063/1.3147203

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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.

引用

页数：3

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