Gate-tunable graphene spin valve

被引：252

作者：

Cho, Sungjae

Chen, Yung-Fu

Fuhrer, Michael S. ^{[1
]}

机构：

[1] Univ Maryland, Dept Phys, College Pk, MD 20742 USA

[2] Univ Maryland, Ctr Nanophys & Adv Mat, College Pk, MD 20742 USA

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 12期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1063/1.2784934

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The authors perform nonlocal four-probe spin-valve experiments on graphene contacted by ferromagnetic Permalloy electrodes. They observe sharp switching and often sign reversal of the nonlocal resistance at the coercive field of the electrodes, indicating the presence of a spin current between injector and detector. The nonlocal spin-valve signal changes magnitude and sign with back-gate voltage, and is observed up to T=300 K. The gate voltage variation of the spin-valve signal may result from quantum-coherent transport, as evidenced by Fabry-Perot-like oscillations of the current.

引用

页数：3

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