Quantum transport through a graphene nanoribbon-superconductor junction
文献类型：期刊论文
| 作者 | Sun, QF ; Xie, XC |
| 刊名 | JOURNAL OF PHYSICS-CONDENSED MATTER
 |
| 出版日期 | 2009 |
| 卷号 | 21期号:34 |
| 关键词 | ANDREEV REFLECTION SCHEME SYSTEM PHASE |
| ISSN号 | 0953-8984 |
| 通讯作者 | Sun, QF (reprint author), Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | We study the electron transport through a graphene nanoribbon-superconductor junction. Both zigzag and armchair edge graphene nanoribbons are considered, and the effects of the magnetic field and disorder on the transport property are investigated. By using the tight-binding model and the non-equilibrium Green's function method, the expressions of the current, conductance, normal tunneling coefficient and Andreev reflection coefficient are obtained. For a clean system and at zero magnetic field, the linear conductance increases approximately in a linear fashion with the on-site energy. In the presence of a magnetic field and a moderate disorder, the linear conductance exhibits plateau structures for both armchair and zigzag edges. The plateau values increase with the width of the graphene ribbon. With a wide sample width, a saturated plateau value of vertical bar nu vertical bar e(2)/h emerges at the filling factor nu. For a small filling factor, the conductance can reach the saturated value at a small width, but for a high filling factor it requires to have a quite wide sample width to reach the saturated value. In particular, the Andreev reflection coefficient is always at 0.5 after reaching the saturated value, independent of any system parameters. In addition, we also consider the finite bias case, in which the Andreev reflection coefficient and normal tunneling coefficient are studied. |
| 收录类别 | SCI |
| 资助信息 | NSFChina [10525418, 10734110]; US-DOE [DE-FG02-04ER46124]; US-NSF |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/51758]  |
| 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 | Sun, QF,Xie, XC. Quantum transport through a graphene nanoribbon-superconductor junction[J]. JOURNAL OF PHYSICS-CONDENSED MATTER,2009,21(34). |
| APA | Sun, QF,&Xie, XC.(2009).Quantum transport through a graphene nanoribbon-superconductor junction.JOURNAL OF PHYSICS-CONDENSED MATTER,21(34). |
| MLA | Sun, QF,et al."Quantum transport through a graphene nanoribbon-superconductor junction".JOURNAL OF PHYSICS-CONDENSED MATTER 21.34(2009). |
入库方式： OAI收割
来源：物理研究所
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