Theory of huge tunneling magnetoresistance in graphene
Theory of huge tunneling magnetoresistance in graphene
复制标题
石墨烯巨隧道磁阻理论
DOI：
10.1103/physrevb.77.113409
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发表时间：
2008-03-01
影响因子：
3.7
通讯作者：
Chang, Kai
中科院分区：
文献类型：
--
作者：
Zhai, Feng;Chang, Kai
我们从理论上研究了由两个平行铁磁体调制的石墨烯单层中的自旋无关隧穿磁电阻效应。对于平行磁化配置，克莱因隧道可以观察到的透射谱，但在特定的斜入射角。对于反平行磁化结构，传输可以被铁磁体提供的磁电势垒阻挡。这种传输差异导致巨大的磁阻比，并且可以通过包含电势垒来调谐。
We investigate theoretically the spin-independent tunneling magnetoresistance effect in a graphene monolayer modulated by two parallel ferromagnets deposited on a dielectric layer. For the parallel magnetization configuration, Klein tunneling can be observed in the transmission spectrum but at specific oblique incident angles. For the antiparallel magnetization configuration, the transmission can be blocked by the magnetic-electric barrier provided by the ferromagnets. Such a transmission discrepancy results in a tremendous magnetoresistance ratio and can be tuned by the inclusion of an electric barrier.