Competition of edge effects on the electronic properties and excitonic effects in short graphene nanoribbons
文献类型：期刊论文
| 作者 | Lu,Yan1; Wei,Sheng1; Jin,Jing1; Lu,Wengang2,3; Wang,Li1 |
| 刊名 | New journal of physics
 |
| 出版日期 | 2016-12-23 |
| 卷号 | 18期号:12 |
| ISSN号 | 1367-2630 |
| 关键词 | Exciton effects Short graphene nanoribbons Edge states Spin polarization Tight-binding model |
| DOI | 10.1088/1367-2630/aa5116 |
| 英文摘要 | Abstract we explore the electronic properties and exciton effects in short graphene nanoribbons (sgnrs), which have two armchair edges and two zigzag edges. our results show that both of these two types of edges have profound effects on the electronic properties and exciton effects. both the highest occupied molecular orbital (homo) and the lowest unoccupied molecular orbital (lumo) states are alternatively changed between the bulk and the edge states as the lengths of the zigzag edges increase, due to the competition between the states of the two types of edges. the energy gaps, as a function of the lengths of the armchair edges, will then induce two kinds of trends. furthermore, two kinds of exciton energies and exciton binding energies are found, which can be understood through the two kinds of homo and lumo states in sgnrs. in addition, we find that the three triplet exciton states are not totally energy degenerate in sgnrs due to the spin-polarized states on the zigzag edges. |
| 语种 | 英语 |
| 出版者 | IOP Publishing |
| WOS记录号 | IOP:1367-2630-18-12-AA5116 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2373539 |
| 专题 | 物理研究所 |
| 作者单位 | 1.Department of Physics, Nanchang University, Nanchang, 330031, People's Republic of China 2.Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, People's Republic of China 3.Beijing Key Laboratory for Nanomaterials and Nanodevices, Beijing, 100190, People's Republic of China |
| 推荐引用方式 GB/T 7714 | Lu,Yan,Wei,Sheng,Jin,Jing,et al. Competition of edge effects on the electronic properties and excitonic effects in short graphene nanoribbons[J]. New journal of physics,2016,18(12). |
| APA | Lu,Yan,Wei,Sheng,Jin,Jing,Lu,Wengang,&Wang,Li.(2016).Competition of edge effects on the electronic properties and excitonic effects in short graphene nanoribbons.New journal of physics,18(12). |
| MLA | Lu,Yan,et al."Competition of edge effects on the electronic properties and excitonic effects in short graphene nanoribbons".New journal of physics 18.12(2016). |
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