The effect of disorder on the valley-dependent transport in zigzag graphene nanoribbons
文献类型：期刊论文
| 作者 | Zhang, YT ; Sun, QF ; Xie, XC |
| 刊名 | JOURNAL OF APPLIED PHYSICS
 |
| 出版日期 | 2011 |
| 卷号 | 109期号:12 |
| 关键词 | HGTE QUANTUM-WELLS CONDUCTANCE FLUCTUATIONS EPITAXIAL-GRAPHENE TRANSISTORS FIELD GAS COLLOQUIUM SCATTERING SCHEME PHASE |
| ISSN号 | 0021-8979 |
| 通讯作者 | Zhang, YT (reprint author), Hebei Normal Univ, Coll Phys, Shijiazhuang 050016, Peoples R China. |
| 中文摘要 | We investigate the electron transport through a zigzag graphene nanoribbon with a staggered sublattice potential and a certain asymmetric boundary potential. By using the tight binding model to combine with the nonequilibrium Green's function theory and the Landauer-Buttiker formalism, the energy band structure, conductance, and conductance fluctuation are calculated. We find that an energy gap opens up due to the inversion symmetry breaking by the staggered sublattice potential. By further tuning the boundary potential, the gapless valley-dependent edge states are achieved in which the carriers with the different valleys on a given boundary propagate in opposite directions. Furthermore, we study the effect of long range disorder on the transport properties of the valley-dependent edge states. The results show that the conductance plateau 4e(2)/h contributed by the edge states can be maintained well in a broad range of disorder strength for low-density disorder, indicating the robustness of the valley-dependent transport. In addition, the conductance fluctuation is also studied, and the fluctuation almost vanishes at weak disorder. On the other hand, at intermediate disorder strength with the system in the diffusive regime, the universal conductance fluctuation is exhibited. The conductance fluctuation is independent of various parameters, e. g., the ribbon width, the disorder range, and the disorder density. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3599930] |
| 收录类别 | SCI |
| 资助信息 | NSF-China [11004046, 11074174, 10734110]; China-973 program; Natural Science Foundation of Hebei Province of China [A2010000339]; US-DOE [DE-FG-02-04ER46124]; Oklahoma C-Spin center |
| 语种 | 英语 |
| 公开日期 | 2013-09-23 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/45027]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Zhang, YT,Sun, QF,Xie, XC. The effect of disorder on the valley-dependent transport in zigzag graphene nanoribbons[J]. JOURNAL OF APPLIED PHYSICS,2011,109(12). |
| APA | Zhang, YT,Sun, QF,&Xie, XC.(2011).The effect of disorder on the valley-dependent transport in zigzag graphene nanoribbons.JOURNAL OF APPLIED PHYSICS,109(12). |
| MLA | Zhang, YT,et al."The effect of disorder on the valley-dependent transport in zigzag graphene nanoribbons".JOURNAL OF APPLIED PHYSICS 109.12(2011). |
入库方式： OAI收割
来源：物理研究所
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