• 文献标题:   Effect of ferroelectric domains on electric properties of single layer graphene
  • 文献类型:   Article, Proceedings Paper
  • 作  者:   ZELENOVSKII P, ROMANYUK K, VIDYASAGAR R, AKHMATKHANOV A, ZHAO P, SHUR VY, KHOLKIN AL
  • 作者关键词:   graphene, ferroelectric, domain structure, ppln, confocal raman microscopy, electric field
  • 出版物名称:   FERROELECTRICS
  • ISSN:   0015-0193 EI 1563-5112
  • 通讯作者地址:   Ural Fed Univ
  • 被引频次:   1
  • DOI:   10.1080/00150193.2019.1574669
  • 出版年:   2019

▎ 摘  要

Ferroelectric materials with tailored domain structures are promising "smart" substrates providing additional degrees of functionality for the graphene-based devices. We demonstrate the effect of periodical domain structure in lithium niobate substrate on the electrical properties of graphene studied by Raman spectroscopy. The spatial variations of the charge carriers and Fermi levels in graphene corresponding to oppositely polarized domains have been elucidated. The observed effects are supposed to be driven by the lateral component of electric field at the surface related to the gradient of spontaneous polarization. The five orders of magnitude decay of charge density in graphene is due to screening of depolarization field.