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The spin-dependent transport and optoelectronic properties of the 6,6,12-graphyne-based magnetic tunnel junction devices
Organic Electronics ( IF 3.2 ) Pub Date : 2017-11-03 , DOI: 10.1016/j.orgel.2017.11.001
Maoyun Di , Zhi Yang , Jin Li , Huifang Bai , Luyao Hao , Li-Chun Xu , Ruiping Liu , Xuguang Liu

Using density functional theory and nonequilibrium Green's function method, we investigated the spin-dependent transport and spin-polarized optoelectronic properties of the 6,6,12-graphyne-based magnetic tunnel junction (MTJ) devices. The results show that the MTJ devices have prominent dual spin-filtering effect and large tunneling magnetoresistance (TMR); the TMR values of the MTJ devices are as high as 105%. In addition, we found that the spin-polarized photocurrents of the MTJ devices are dependent on the polarization direction of light and the magnetization directions of the electrodes. Two spin-polarized photocurrents can be realized in the MTJ devices and, if the magnetization directions of the two electrodes are antiparallel, the two light-generated spins flow in opposite directions. These interesting phenomena indicate that the 6,6,12-graphyne-based MTJ devices could be used as optoelectronic or opto-spintronic devices.



中文翻译:

6,6,12-石墨烯基磁性隧道结器件的自旋相关输运和光电性能

使用密度泛函理论和非平衡格林函数方法,我们研究了6,6,12-石墨烯基磁性隧道结(MTJ)器件的自旋相关输运和自旋极化光电性能。结果表明,MTJ器件具有显着的双重自旋滤波作用和较大的隧穿磁阻(TMR)。MTJ设备的TMR值高达10 5%。此外,我们发现MTJ器件的自旋极化光电流取决于光的极化方向和电极的磁化方向。在MTJ器件中可以实现两个自旋极化的光电流,如果两个电极的磁化方向反平行,则两个光产生的自旋会沿相反的方向流动。这些有趣的现象表明,基于6,6,12石墨烯的MTJ器件可用作光电或光电自旋电子器件。

更新日期:2017-11-03
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