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Helical quantum Hall phase in graphene on SrTiO3
Veyrat, Louis1; Deprez, Corentin1; Coissard, Alexis1; Li, Xiaoxi2,3,4; Gay, Frederic1; Watanabe, Kenji5; Taniguchi, Takashi5; Han, Zheng2,3,4; Piot, Benjamin A.6; Sellier, Hermann1; Sacepe, Benjamin1
Corresponding AuthorSacepe, Benjamin(benjamin.sacepe@neel.cnrs.fr)
2020-02-14
Source PublicationSCIENCE
ISSN0036-8075
Volume367Issue:6479Pages:781-+
AbstractThe 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.
Funding OrganizationH2020 ERC grant QUEST ; Elemental Strategy Initiative ; A3 Foresight by JSPS ; CREST, JST ; National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; State Key Laboratory of Quantum Optics and Quantum Optics Devices
DOI10.1126/science.aax8201
Indexed BySCI
Language英语
Funding ProjectH2020 ERC grant QUEST[637815] ; Elemental Strategy Initiative ; A3 Foresight by JSPS ; CREST, JST[JPMJCR15F3] ; National Key R&D Program of China[2019YFA0307800] ; National Key R&D Program of China[2017YFA0206302] ; National Natural Science Foundation of China (NSFC)[11504385] ; National Natural Science Foundation of China (NSFC)[U1932151] ; National Natural Science Foundation of China (NSFC)[51627801] ; State Key Laboratory of Quantum Optics and Quantum Optics Devices[KF201816]
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000514105000033
PublisherAMER ASSOC ADVANCEMENT SCIENCE
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/137984
Collection中国科学院金属研究所
Corresponding AuthorSacepe, Benjamin
Affiliation1.Univ Grenoble Alpes, CNRS, Inst Neel, Grenoble INP, F-38000 Grenoble, France
2.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
3.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
4.Shanxi Univ, State Key Lab Quantum Opt & Quantum Opt Devices, Inst Optoelect, Taiyuan 030006, Shanxi, Peoples R China
5.Natl Inst Mat Sci, 1-1 Namiki, Tsukuba, Ibaraki 3060044, Japan
6.Univ Grenoble Alpes, UPS INSA EMFL CNRS LNCMI, F-38000 Grenoble, France
Recommended Citation
GB/T 7714
Veyrat, Louis,Deprez, Corentin,Coissard, Alexis,et al. Helical quantum Hall phase in graphene on SrTiO3[J]. SCIENCE,2020,367(6479):781-+.
APA Veyrat, Louis.,Deprez, Corentin.,Coissard, Alexis.,Li, Xiaoxi.,Gay, Frederic.,...&Sacepe, Benjamin.(2020).Helical quantum Hall phase in graphene on SrTiO3.SCIENCE,367(6479),781-+.
MLA Veyrat, Louis,et al."Helical quantum Hall phase in graphene on SrTiO3".SCIENCE 367.6479(2020):781-+.
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