我所张希刁东风等在APL上发表论文阅读次数 [2930] 发布时间 :2014-09-01 15:45:43

Magnetism induced by excess electrons trapped at diamagnetic edge-quantum well in multi-layer grapheneApplied Physics Letters 105, 042402 (2014)

Xi Zhang, Chao Wang, Chang Q Sun, and Dongfeng Diao*

In this paper, we clarified a robust mechanism of magnetism generated by excess electrons captured by edge-quantum well of diamagnetic armchair edges. Consistency between density functional theory calculations and electron cyclotron resonance experiments verified that: (1) Multi-layer armchair nanoribbons are stable with proper amounts of excess electrons which can provide net spin; (2) Since under-coordination induces lattice relaxation and potential well modulation, electrons tend to be trapped at edges; and (3) Neither large amount of excess electrons nor positive charges can induce magnetism. This work shed light on the development of graphene devices in its magnetic applications。

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