arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2107.06014cond-mat.mes-hall
收藏

电控范德华反铁磁自旋阀

Electrically Controllable van der Waals Antiferromagnetic Spin Valve

Xue-Chao Zhai, Ziming, Xu, Qirui Cui, Yingmei Zhu, Hongxin Yang, Yaroslav M. Blanter

摘要:

我们提出了一个自旋阀,是基于范德华反铁磁性和完全电控。该设备是由两个反铁磁终端,允许垂直偏置控制和一个链接的中心散射电位区。当两个端子中的偏置取向从平行切换到反平行时,磁阻显著变化,因为这种切换引起系统不同部分中相同自旋投影的带的失配。从密度泛函计算中示出,由Cr $_2$ Ge $_2$ Te $_6$的两个原子层封装的双层石墨烯提供了实现反铁磁性的材料平台,其对于所需的垂直电场是鲁棒的。

英文摘要:

We propose a spin valve that is based on van der Waals antiferromagnetism and fully electrically controlled. The device is composed of two antiferromagnetic terminals that allow for vertical bias control and a linked central scattering potential region. The magnetoresistance varies significantly when the bias orientations in two terminals are switched from parallel to antiparallel because this switch induces a mismatch of the bands for the same spin projection in different parts of the system. It is shown from density functional calculations that bilayer graphene encapsulated by two atomic layers of Cr$_2$Ge$_2$Te$_6$ provides a material platform to realize the antiferromagnetism, which is robust against the required vertical electric fields.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑