Spontaneous spin polarization of methanol molecule adsorbed on B- or N-doped graphene: first-principles calculations

Spontaneous spin polarization of methanol molecule adsorbed on B- or N-doped graphene: first-principles calculations
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吸附在 B 或 N 掺杂石墨烯上的甲醇分子的自发自旋极化:第一原理计算

DOI:
10.1140/epjb/e2019-90485-3
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发表时间:
2019-02
影响因子:
1.6
通讯作者:
X. B. Yuan
X. B. Yuan
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
X. W. Zhao;B. Qiu;W. W. Yue;G. C. Hu;J. F. Ren;X. B. Yuan

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摘要 当甲醇分子吸附在含有B或N原子的石墨烯表面时,即使整个体系中没有磁性元素,甲醇分子也可以自发自旋极化。甲醇分子与石墨烯之间的p轨道耦合产生了新的自旋耦合态,从石墨烯到甲醇分子的电荷转移将填充这些自旋非简并态,导致甲醇分子明显的自发自旋极化.当甲醇分子吸附在石墨烯表面的顶位上时,N作为锚,甲醇分子的自旋极化最大。 图形摘要
Abstract Methanol molecule could be spontaneously spin polarized when it is adsorbed on graphene surface with B or N atoms even there is no magnetic elements in the whole systems. The p-orbital couplings between the methanol molecule and the graphene generate new spin coupling states, and the transferred charge from the graphene to the molecule will fill these spin nondegenerate states, which leads to obvious spontaneous spin polarization of the methanol molecule. Spin polarization of the methanol molecule will be the biggest when it is adsorbed on the top site of the graphene surface with N acting as anchor. Graphical abstract
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