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| DOI | 10.1126/science.aaf1095 |
| Ballistic miniband conduction in a graphene superlattice | |
| Lee M.; Wallbank J.R.; Gallagher P.; Watanabe K.; Taniguchi T.; Fal'Ko V.I.; Goldhaber-Gordon D. | |
| 发表日期 | 2016 |
| ISSN | 0036-8075 |
| 起始页码 | 1526 |
| 结束页码 | 1529 |
| 卷号 | 353期号:6307 |
| 英文摘要 | Rational design of long-period artificial lattices yields effects unavailable in simple solids. The moiré pattern in highly aligned graphene/hexagonal boron nitride (h-BN) heterostructures is a lateral superlattice with high electron mobility and an unusual electronic dispersion whose miniband edges and saddle points can be reached by electrostatic gating. We investigated the dynamics of electrons in moiré minibands by measuring ballistic transport between adjacent local contacts in a magnetic field, known as the transverse electron focusing effect. At low temperatures, we observed caustics of skipping orbits extending over hundreds of superlattice periods, reversals of the cyclotron revolution for successive minibands, and breakdown of cyclotron motion near van Hove singularities. At high temperatures, electron-electron collisions suppress focusing. Probing such miniband conduction properties is a necessity for engineering novel transport behaviors in superlattice devices. © 2016, American Association for the Advancement of Science. All rights reserved. |
| 英文关键词 | graphene; boron; carbon; electrical conductivity; electron; lattice dynamics; magnetic field; temperature; Article; chemical structure; conductance; cyclotron; dispersion; electron; electronics; low temperature; magnetic field; oscillation; priority journal; temperature dependence |
| 语种 | 英语 |
| 来源期刊 | Science
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/244486 |
| 作者单位 | Department of Physics, Geballe Laboratory for Advanced Materials, Stanford University, Stanford, CA 94305, United States; National Graphene Institute, University of Manchester, Manchester, M13 9PL, United Kingdom; National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, Japan; School of Physics and Astronomy, University of Manchester, Manchester, M13 9PL, United Kingdom |
| 推荐引用方式 GB/T 7714 | Lee M.,Wallbank J.R.,Gallagher P.,et al. Ballistic miniband conduction in a graphene superlattice[J],2016,353(6307). |
| APA | Lee M..,Wallbank J.R..,Gallagher P..,Watanabe K..,Taniguchi T..,...&Goldhaber-Gordon D..(2016).Ballistic miniband conduction in a graphene superlattice.Science,353(6307). |
| MLA | Lee M.,et al."Ballistic miniband conduction in a graphene superlattice".Science 353.6307(2016). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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