Spin Relaxation in Weak Localization Regime in Multilayer Graphene Spin Valves
Spin Relaxation in Weak Localization Regime in Multilayer Graphene Spin Valves
复制标题
多层石墨烯自旋阀中弱局域化状态下的自旋弛豫
DOI：
10.7567/jjap.52.040205
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发表时间：
2013
影响因子：
1.5
通讯作者：
T. Machida
中科院分区：
文献类型：
--
作者：
Takehiro Yamaguchi;R. Moriya;S. Masubuchi;Kazuyuki Iguchi;T. Machida
使用非局部磁阻（NLMR）测量来测量多层石墨烯（MLG）自旋阀器件中自旋弛豫时间τs的温度依赖性。从~70 K 以下的磁阻 (MR) 测量中观察到弱局域化 (WL)，这表明电荷载流子的相干传输。在相同的温度范围内，我们观察到尽管扩散常数 Ds 被 WL 抑制，但自旋弛豫时间 τs 和自旋扩散长度 λs 大幅增加。这表明，当电荷在相干电荷传输机制中经历量子干涉效应时，MLG 中的自旋弛豫时间可以显着延长。
The temperature dependence of the spin relaxation time τs in multilayer graphene (MLG) spin valve devices was measured using a non-local magnetoresistance (NLMR) measurement. A weak localization (WL) was observed from magnetoresistance (MR) measurements below ∼70 K, suggesting coherent transport of the charge carriers. Within the same temperature range, we observed a large increase in the spin relaxation time τs and spin diffusion length λs even though the diffusion constant Ds was suppressed by the WL. This demonstrated that the spin relaxation time in MLG could be significantly extended when the charge experiences quantum interference effect in the coherent charge transport regime.
影响因子：
8.6
作者：
Tikhonenko, F. V.;Horsell, D. W.;Savchenko, A. K.
通讯作者：
Savchenko, A. K.