• 文献标题:   Electrical and thermal generation of spin currents by magnetic bilayer graphene
  • 文献类型:   Article
  • 作  者:   GHIASI TS, KAVERZIN AA, DISMUKES AH, DE WAL DK, ROY X, VAN WEES BJ
  • 作者关键词:  
  • 出版物名称:   NATURE NANOTECHNOLOGY
  • ISSN:   1748-3387 EI 1748-3395
  • 通讯作者地址:  
  • 被引频次:   44
  • DOI:   10.1038/s41565-021-00887-3 EA MAY 2021
  • 出版年:   2021

▎ 摘  要

Graphene promises long-distance transfer of spin information with concomitant high charge carrier mobility. Proximity coupling of bilayer graphene with the 2D interlayer antiferromagnetic CrSBr now enables active generation of spin currents in graphene both electrically and thermally. Ultracompact spintronic devices greatly benefit from the implementation of two-dimensional materials that provide large spin polarization of charge current together with long-distance transfer of spin information. Here spin-transport measurements in bilayer graphene evidence a strong spin-charge coupling due to a large induced exchange interaction by the proximity of an interlayer antiferromagnet (CrSBr). This results in the direct detection of the spin polarization of conductivity (up to 14%) and a spin-dependent Seebeck effect in the magnetic graphene. The efficient electrical and thermal spin-current generation is the most technologically relevant aspect of magnetism in graphene, controlled here by the antiferromagnetic dynamics of CrSBr. The high sensitivity of spin transport in graphene to the magnetization of the outermost layer of the adjacent antiferromagnet, furthermore, enables the read-out of a single magnetic sublattice. The combination of gate-tunable spin-dependent conductivity and Seebeck coefficient with long-distance spin transport in a single two-dimensional material promises ultrathin magnetic memory and sensory devices based on magnetic graphene.