Engineering of carbon-based superlight spin filter with negative differential resistance |
| |
Authors: | Xi Zuo Li Han Heming Li Xiaoteng Li Jingfen Zhao Bin Cui Desheng Liu |
| |
Affiliation: | 1. School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China;2. Department of Physics, Jining University, Qufu 273155, China;3. College of Physics and Electronic Engineering, Qilu Normal University, Jinan 250014, China |
| |
Abstract: | Based on density functional theory and non-equilibrium Green's function, we investigate the edge hydrogenation and oxidation effects on the spin transport of devices consisting of a zigzag C2N nanoribbon (ZC2NNR) embedded in zigzag graphene nanoribbons in parallel (P) and antiparallel (AP) spin configurations. The results show that device with edge hydrogenation exhibits dual spin filtering effect in AP spin configuration and obvious negative differential resistance in both P and AP spin configuration. By substituting oxygen for hydrogen as passivation atoms of ZC2NNR, the spin filtering efficiency is as high as 100% in the P spin configuration, and the negative differential resistance is largely enhanced with a peak to valley ratio in excess of 4×103. Our theoretical studies suggest that zigzag C2N nanoribbon modulated by edge substitution has great potential in the design of future multifunctional spin devices. |
| |
Keywords: | Edge modification Negative differential resistance Spin filtering effect |
本文献已被 ScienceDirect 等数据库收录! |
|