Observation of an intrinsic bandgap and Landau level renormalization in graphene/boron-nitride heterostructures
文献类型：期刊论文
| 作者 | Chen, ZG ; Shi, ZW ; Yang, W ; Lu, XB ; Lai, Y ; Yan, HG ; Wang, F ; Zhang, GY ; Li, ZQ |
| 刊名 | NATURE COMMUNICATIONS
 |
| 出版日期 | 2014 |
| 卷号 | 5 |
| ISSN号 | 2041-1723 |
| 通讯作者 | Li, ZQ (reprint author), Natl High Magnet Field Lab, Tallahassee, FL 32310 USA. |
| 中文摘要 | Van der Waals heterostructures formed by assembling different two-dimensional atomic crystals into stacks can lead to many new phenomena and device functionalities. In particular, graphene/boron-nitride heterostructures have emerged as a very promising system for band engineering of graphene. However, the intrinsic value and origin of the bandgap in such heterostructures remain unresolved. Here we report the observation of an intrinsic bandgap in epitaxial graphene/boron-nitride heterostructures with zero crystallographic alignment angle. Magneto-optical spectroscopy provides a direct probe of the Landau level transitions in this system and reveals a bandgap of similar to 38 meV (440 K). Moreover, the Landau level transitions are characterized by effective Fermi velocities with a critical dependence on specific transitions and magnetic field. These findings highlight the important role of many-body interactions in determining the fundamental properties of graphene heterostructures. |
| 资助信息 | User Collaboration Grants Programme at the National High Magnetic Field Laboratory; Office of Basic Energy Science, Department of Energy [DE-SC0003949, DE-AC02-05CH11231]; National Basic Research Program of China (973 Program) [2013CB934500]; National Science Foundation of China (NSFC) [61325021, 91223204]; Chinese Academy of Sciences; National Science Foundation Cooperative Agreement [DMR-1157490]; State of Florida; US Department of Energy |
| 语种 | 英语 |
| 公开日期 | 2015-04-14 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/59383]  |
| 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 | Chen, ZG,Shi, ZW,Yang, W,et al. Observation of an intrinsic bandgap and Landau level renormalization in graphene/boron-nitride heterostructures[J]. NATURE COMMUNICATIONS,2014,5. |
| APA | Chen, ZG.,Shi, ZW.,Yang, W.,Lu, XB.,Lai, Y.,...&Li, ZQ.(2014).Observation of an intrinsic bandgap and Landau level renormalization in graphene/boron-nitride heterostructures.NATURE COMMUNICATIONS,5. |
| MLA | Chen, ZG,et al."Observation of an intrinsic bandgap and Landau level renormalization in graphene/boron-nitride heterostructures".NATURE COMMUNICATIONS 5(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。