Enhancement of Rashba spin-orbit coupling by electron-electron interaction
Abstract
We studied how the electron-electron (e-e) interaction enhances the strength of the Rashba spin-orbit coupling (RSOC) and opens the possibility of generating a spin-polarized output current from an unpolarized electric current without any magnetic elements. In this regard, we proposed a novel design of a graphene-like junction based on the - interaction and the . The results showed that the - interaction with opens a spin energy gap and extremely enhances the in this spin energy gap. Interestingly, the junction produces a large spin-polarized current and could act as a high-efficiency spin filter device (nearly 100\% spin polarization) at room temperature even at low Rashba and e-e interaction strengths. However, with an appropriate design, we showed that RSOC could strongly weaken the spin-polarized current and the spin energy gap, which is solely produced by the - interaction, but a high spin polarization persists in some energy ranges.
Keywords
Cite
@article{arxiv.1608.05841,
title = {Enhancement of Rashba spin-orbit coupling by electron-electron interaction},
author = {R. Farghadan and A. Sehat},
journal= {arXiv preprint arXiv:1608.05841},
year = {2016}
}