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| DOI | 10.1126/science.aax8201 |
| Helical quantum Hall phase in graphene on SrTiO3 | |
| Veyrat L.; Déprez C.; Coissard A.; Li X.; Gay F.; Watanabe K.; Taniguchi T.; Han Z.; Piot B.A.; Sellier H.; Sacépé B. | |
| 发表日期 | 2020 |
| ISSN | 0036-8075 |
| 起始页码 | 781 |
| 结束页码 | 786 |
| 卷号 | 367期号:6479 |
| 英文摘要 | The ground state of charge-neutral graphene under perpendicular magnetic field was predicted to be a quantum Hall topological insulator with a ferromagnetic order and spin-filtered, helical edge channels. In most experiments, however, an insulating state is observed that is accounted for by lattice-scale interactions that promote a broken-symmetry state with gapped bulk and edge excitations. We tuned the ground state of the graphene zeroth Landau level to the topological phase through a suitable screening of the Coulomb interaction with the high dielectric constant of a strontium titanate (SrTiO3) substrate. Robust helical edge transport emerged at magnetic fields as low as 1 tesla and withstanding temperatures up to 110 kelvin over micron-long distances. This versatile graphene platform may find applications in spintronics and topological quantum computation. Copyright © 2020 The Authors, |
| 关键词 | graphenemetal oxidestrontium titanateunclassified drugexperimental studymagnetic fieldtemperature effecttopologyArticlecontrolled studydielectric constantmagnetic fieldpredictionpriority journalquantum mechanicstemperature |
| 语种 | 英语 |
| 来源机构 | Science |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/133714 |
| 推荐引用方式 GB/T 7714 | Veyrat L.,Déprez C.,Coissard A.,et al. Helical quantum Hall phase in graphene on SrTiO3[J]. Science,2020,367(6479). |
| APA | Veyrat L..,Déprez C..,Coissard A..,Li X..,Gay F..,...&Sacépé B..(2020).Helical quantum Hall phase in graphene on SrTiO3.,367(6479). |
| MLA | Veyrat L.,et al."Helical quantum Hall phase in graphene on SrTiO3".367.6479(2020). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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