arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1011.6014cond-mat.mtrl-sci
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用于高性能二维自旋电子学器件的功能化石墨烯

Functionalized Graphene for High Performance Two-dimensional Spintronics Devices

Linze Li, Rui Qin, Hong Li, Lili Yu, Qihang Liu, Guangfu Luo, Jing Lu, Zhengxiang Gao

摘要:

利用第一性原理计算,我们探索了功能化石墨烯作为高性能二维自旋电子学器件的可能性。石墨烯功能化与O在一侧和H在另一侧的椅子构象被发现是一个铁磁金属的自旋过滤器效率高达85%,在有限的偏压。在椅子构象中用F半官能化的石墨烯的基态是反铁磁半导体,并且我们通过引入磁场来稳定其铁磁金属态来构建磁阻器件。室温磁电阻高达5400%,比现有的实验值大一个数量级。

英文摘要:

Using first-principles calculations, we explore the possibility of functionalized graphene as high performance two-dimensional spintronics device. Graphene functionalized with O on one side and H on the other side in the chair conformation is found to be a ferromagnetic metal with a spin-filter efficiency up to 85% at finite bias. The ground state of graphene semi-functionalized with F in the chair conformation is an antiferromagnetic semiconductor, and we construct a magnetoresistive device from it by introducing a magnetic field to stabilize its ferromagnetic metallic state. The resulting room-temperature magnetoresistance is up to 5400%, which is one order of magnitude larger than the available experimental values.

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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