Graphene magnet realized by hydrogenated graphene nanopore arrays (Retracted article. See vol. 100, 099904, 2012)
Graphene magnet realized by hydrogenated graphene nanopore arrays (Retracted article. See vol. 100, 099904, 2012)
复制标题
DOI：
10.1063/1.3653286
复制
发表时间：
2011-10-31
影响因子：
4
通讯作者：
Fukuyama, H.
中科院分区：
文献类型：
--
作者：
Tada, K.;Haruyama, J.;Fukuyama, H.
由于费米能级附近存在平坦能带，石墨烯的所谓之字形边缘理论上具有局域化的电子。局域化的电子自旋被强烈极化，导致铁磁性。我们使用纳米多孔氧化铝模板通过非光刻方法制备了具有氢封端的蜂窝状阵列和低缺陷六方纳米孔的石墨烯。我们报告了大幅度的室温铁磁性所造成的电子自旋定位在锯齿形纳米孔边缘。这有望实现无稀土元素、可控、透明、柔性和单原子层磁体和新型自旋电子器件。(C)2011年美国物理学会。[doi：10.1063/1.3653286]
The so-called zigzag edge of graphenes theoretically has localized electrons due to the presence of flat energy bands near the Fermi level. The localized electron spins are strongly polarized, resulting in ferromagnetism. We fabricate graphenes with honeycomb-like arrays of hydrogen-terminated and low-defect hexagonal nanopores by a nonlithographic method using nanoporous alumina templates. We report large-magnitude room-temperature ferromagnetism caused by electron spins localizing at the zigzag nanopore edges. This promises to be a realization of rare-element free, controllable, transparent, flexible, and mono-atomic layer magnets and novel spintronic devices. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3653286]