arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0902.3853cond-mat.str-elcond-mat.other
收藏

存在Rashba自旋轨道耦合时极化子的形成:对自旋电子学的影响

Polaron formation in the presence of Rashba spin-orbit coupling: implications for spintronics

Lucian Covaci, Mona Berciu

摘要:

我们研究了Rashba自旋轨道耦合对极化子形成的影响,使用适当的推广的动量平均近似。与以前的研究相反,我们发现自旋-轨道相互作用降低了有效的电子-声子耦合。因此,可以通过增加自旋-轨道耦合来降低极化子的有效质量。我们还表明,当自旋轨道耦合是大的声子能量相比,极化子保留在其相干谱中的自旋极化带之一。这对自旋极化电流在这种材料中的传播,以及自旋电子学的应用具有重要意义。

英文摘要:

We study the effects of the Rashba spin-orbit coupling on the polaron formation, using a suitable generalization of the Momentum Average approximation. Contrary to previous investigations of this problem, we find that the spin-orbit interaction decreases the effective electron-phonon coupling. It is thus possible to lower the effective mass of the polaron by increasing the spin-orbit coupling. We also show that when the spin-orbit coupling is large as compared to the phonon energy, the polaron retains only one of the spin polarized bands in its coherent spectrum. This has major implications for the propagation of spin-polarized currents in such materials, and thus for spintronic applications.

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。

↑