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DOI | 10.1126/science.aan8458 |
Observation of fractional Chern insulators in a van der Waals heterostructure | |
Spanton, Eric M.1; Zibrov, Alexander A.2; Zhou, Haoxin2; Taniguchi, Takashi3; Watanabe, Kenji3; Zaletel, Michael P.4; Young, Andrea F.2 | |
2018-04-06 | |
发表期刊 | SCIENCE |
ISSN | 0036-8075 |
EISSN | 1095-9203 |
出版年 | 2018 |
卷号 | 360期号:6384页码:62-66 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Japan |
英文摘要 | Topologically ordered phases are characterized by long-range quantum entanglement and fractional statistics rather than by symmetry breaking. First observed in a fractionally filled continuum Landau level, topological order has since been proposed to arise more generally at fractional fillings of topologically nontrivial Chern bands. Here we report the observation of gapped states at fractional fillings of Harper-Hofstadter bands arising from the interplay of a magnetic field and a superlattice potential in a bilayer graphene-hexagonal boron nitride heterostructure. We observed phases at fractional filling of bands with Chern indices C = -1, +/- 2, and +/- 3. Some of these phases, in C = -1 and C = 2 bands, are characterized by fractional Hall conductance-that is, they are known as fractional Chern insulators and constitute an example of topological order beyond Landau levels. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000429263100046 |
WOS关键词 | GRAPHENE SUPERLATTICES ; DIRAC FERMIONS ; LANDAU-LEVEL ; HALL ; REALIZATION ; MODEL |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/198354 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Calif Santa Barbara, Calif Nanosyst Inst, Santa Barbara, CA 93106 USA; 2.Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA; 3.Natl Inst Mat Sci, Adv Mat Lab, Tsukuba, Ibaraki 3050044, Japan; 4.Princeton Univ, Dept Phys, Princeton, NJ 08544 USA |
推荐引用方式 GB/T 7714 | Spanton, Eric M.,Zibrov, Alexander A.,Zhou, Haoxin,et al. Observation of fractional Chern insulators in a van der Waals heterostructure[J]. SCIENCE,2018,360(6384):62-66. |
APA | Spanton, Eric M..,Zibrov, Alexander A..,Zhou, Haoxin.,Taniguchi, Takashi.,Watanabe, Kenji.,...&Young, Andrea F..(2018).Observation of fractional Chern insulators in a van der Waals heterostructure.SCIENCE,360(6384),62-66. |
MLA | Spanton, Eric M.,et al."Observation of fractional Chern insulators in a van der Waals heterostructure".SCIENCE 360.6384(2018):62-66. |
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