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DOI | 10.1126/science.aaw3780 |
Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene | |
Sharpe, Aaron L.1,2; Fox, Eli J.2,3; Barnard, Arthur W.3; Finney, Joe3; Watanabe, Kenji4; Taniguchi, Takashi4; Kastner, M. A.2,3,5,6; Goldhaber-Gordon, David2,3 | |
2019-08-09 | |
发表期刊 | SCIENCE |
ISSN | 0036-8075 |
EISSN | 1095-9203 |
出版年 | 2019 |
卷号 | 365期号:6453页码:605-608 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Japan |
英文摘要 | When two sheets of graphene are stacked at a small twist angle, the resulting flat superlattice minibands are expected to strongly enhance electron-electron interactions. Here, we present evidence that near three-quarters (3/4) filling of the conduction miniband, these enhanced interactions drive the twisted bilayer graphene into a ferromagnetic state. In a narrow density range around an apparent insulating state at 3/4, we observe emergent ferromagnetic hysteresis, with a giant anomalous Hall (AH) effect as large as 10.4 kilohms and indications of chiral edge states. Notably, the magnetization of the sample can be reversed by applying a small direct current. Although the AH resistance is not quantized, and dissipation is present, our measurements suggest that the system may be an incipient Chern insulator. |
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:000483195200043 |
WOS关键词 | HALL ; INSULATOR ; STATE |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
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/202049 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Stanford Univ, Dept Appl Phys, 348 Via Pueblo Mall, Stanford, CA 94305 USA; 2.SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA; 3.Stanford Univ, Dept Phys, 382 Via Pueblo Mall, Stanford, CA 94305 USA; 4.Natl Inst Mat Sci, Namiki 1-1, Tsukuba, Ibaraki 3050044, Japan; 5.Sci Philanthropy Alliance, 480 Calif Ave 304, Palo Alto, CA 94306 USA; 6.MIT, Dept Phys, 77 Massachusetts Ave, Cambridge, MA 02139 USA |
推荐引用方式 GB/T 7714 | Sharpe, Aaron L.,Fox, Eli J.,Barnard, Arthur W.,et al. Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene[J]. SCIENCE,2019,365(6453):605-608. |
APA | Sharpe, Aaron L..,Fox, Eli J..,Barnard, Arthur W..,Finney, Joe.,Watanabe, Kenji.,...&Goldhaber-Gordon, David.(2019).Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene.SCIENCE,365(6453),605-608. |
MLA | Sharpe, Aaron L.,et al."Emergent ferromagnetism near three-quarters filling in twisted bilayer graphene".SCIENCE 365.6453(2019):605-608. |
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