Electronic and magnetic properties of oxygen patterned graphene superlattice
Electronic and magnetic properties of oxygen patterned graphene superlattice
复制标题
氧图案化石墨烯超晶格的电子和磁性能
DOI：
10.1063/1.4769743
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发表时间：
2012-12-01
影响因子：
3.2
通讯作者：
Wang, Weiliang
中科院分区：
文献类型：
--
作者：
Huang, Haiming;Li, Zhibing;Wang, Weiliang
利用自旋极化密度泛函理论计算研究了通过在石墨烯上吸附氧线而形成的石墨烯超晶格。研究发现，在链（线）的每个周期段上用一个氧吸附物分隔锯齿形链（扶手椅二聚体线）足以将石墨烯片分成一系列石墨烯纳米带。具有扶手椅（Z字形）氧化线（链）的石墨烯的能带隙通过线（链）分离来调制，作为独立石墨烯带的宽度调制。还研究了锯齿形和扶手椅氧化线的不同氧化线宽度的超晶格的磁性。在具有锯齿形界面的氧图案石墨烯超晶格中发现磁性，并且磁性随着分离氧化链宽度的增加而增强。 (C) 2012 年美国物理研究所。 [http://dx.doi.org/10.1063/1.4769743]
Graphene superlattices formed by adsorbing oxygen lines on graphene are studied using spin-polarized density functional theory calculations. It is found that separating zigzag chains (armchair dimer lines) with one oxygen adsorbate on each periodic segment of the chain (line) are sufficient to divide the graphene sheet into series of graphene nanoribbons. The energy band gap of the graphene with armchair (zigzag) oxidation lines (chains) is modulated with line (chain) separation as the width modulation of the freestanding graphene ribbon. The magnetic properties of superlattices with different oxidized line width for both zigzag and armchair oxidized lines are also investigated. Magnetism is found in oxygen-patterned graphene superlattice with zigzag interface and is enhanced with the increasing width of separating oxidation chains. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4769743]