Four-fold Raman enhancement of 2D band in twisted bilayer graphene: evidence for a doubly degenerate Dirac band and quantum interference
文献类型：期刊论文
| 作者 | Wang, YN ; Su, ZH ; Wu, W ; Nie, S ; Lu, XH ; Wang, HY ; McCarty, K ; Pei, SS ; Robles-Hernandez, F ; Hadjiev, VG ; Bao, JM |
| 刊名 | NANOTECHNOLOGY
 |
| 出版日期 | 2014 |
| 卷号 | 25期号:33 |
| 关键词 | twisted bilayer graphene Raman scattering quantum interference |
| ISSN号 | 0957-4484 |
| 通讯作者 | Wang, YN (reprint author), Univ Houston, Dept Elect & Comp Engn, Houston, TX 77204 USA. |
| 中文摘要 | We report the observation of a strong 2D band Raman in twisted bilayer graphene (tBLG) with large rotation angles under 638 nm and 532 nm visible laser excitations. The 2D band Raman intensity increased four-fold as opposed to the two-fold increase observed in single-layer graphene. The same tBLG samples also exhibited rotation-dependent G-line resonances and folded phonons under 364 nm UV laser excitation. We attribute this 2D band Raman enhancement to the constructive interference between two double-resonance Raman pathways, which were enabled by a nearly degenerate Dirac band in the tBLG Moire superlattices. |
| 资助信息 | Office of Basic Energy Sciences, Division of Materials Sciences and Engineering of the US DOE [DE-AC04-94AL85000]; Delta Electronics Foundation; UH CAM; National Science Foundation [ECCS-1240510]; Robert A Welch Foundation [E-1728]; State of Texas through the Texas Center for Superconductivity at the University of Houston |
| 语种 | 英语 |
| 公开日期 | 2015-04-14 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/59370]  |
| 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 | Wang, YN,Su, ZH,Wu, W,et al. Four-fold Raman enhancement of 2D band in twisted bilayer graphene: evidence for a doubly degenerate Dirac band and quantum interference[J]. NANOTECHNOLOGY,2014,25(33). |
| APA | Wang, YN.,Su, ZH.,Wu, W.,Nie, S.,Lu, XH.,...&Bao, JM.(2014).Four-fold Raman enhancement of 2D band in twisted bilayer graphene: evidence for a doubly degenerate Dirac band and quantum interference.NANOTECHNOLOGY,25(33). |
| MLA | Wang, YN,et al."Four-fold Raman enhancement of 2D band in twisted bilayer graphene: evidence for a doubly degenerate Dirac band and quantum interference".NANOTECHNOLOGY 25.33(2014). |
入库方式： OAI收割
来源：物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。