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arXiv 2103.06456cond-mat.mtrl-scicond-mat.mes-hall
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巨逆Rashba-Edelstein效应在单层OsBi $_2$中的应用

Giant Inverse Rashba-Edelstein Effect: Application to Monolayer OsBi$_2$

Rui Song, Ning Hao, Ping Zhang

摘要:

我们认为,两组Rashba带的杂化可以导致一种非常规的拓扑结构,即来自不同带的两个费米圈具有相同手征的面内螺旋自旋织构,并且具有相同方向的群速度.在弱自旋注入条件下,两个费米圈都对自旋-电荷转换产生正贡献,从而产生巨大的逆Rashba-Edelstein效应,具有很高的转换效率,这与传统的Rashba-Edelstein效应有很大不同.更重要的是,通过第一性原理计算,我们预测单层OsBi 2可能是实现巨大的逆Rashba-Edelstein效应的良好候选者。我们的研究不仅为实现自旋电子学中高效的自旋-电荷转换提供了一种新的机制,而且为实现这一目标提供了一种有前途的材料。

英文摘要:

We propose that the hybridization between two sets of Rashba bands can lead to an unconventional topology where the two Fermi circles from different bands own in-plane helical spin textures with the same chiralities, and possess group velocities with the same directions. Under the weak spin injection, the two Fermi circles both give the positive contributions to the spin-to-charge conversion and thus induce the giant inverse Rashba-Edelstein Effect with large conversion efficiency, which is very different from the conventional Rashba-Edelstein Effect. More importantly, through the first-principles calculations, we predict that monolayer OsBi2 could be a good candidate to realize the giant inverse Rashba-Edelstein Effect. Our studies not only demonstrate a new mechanism to achieve highly efficient spin-to-charge conversion in spintronics, but also provide a promising material to realize it.

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。

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