• 文献标题:   Quantum Hall effect in fractal graphene: growth and properties of graphlocons
  • 文献类型:   Article
  • 作  者:   MASSICOTTE M, YU V, WHITEWAY E, VATNIK D, HILKE M
  • 作者关键词:  
  • 出版物名称:   NANOTECHNOLOGY
  • ISSN:   0957-4484 EI 1361-6528
  • 通讯作者地址:   McGill Univ
  • 被引频次:   11
  • DOI:   10.1088/0957-4484/24/32/325601
  • 出版年:   2013

▎ 摘  要

Highly dendritic graphene crystals up to 0.25 mm in diameter are synthesized by low pressure chemical vapor deposition inside a copper enclosure. With their six-fold symmetry and fractal-like shape, the crystals resemble snowflakes. The evolution of the dendritic growth features is investigated for different growth conditions, and surface diffusion is found to be the growth-limiting step responsible for the formation of dendrites. The electronic properties of the dendritic crystals are examined down to sub-Kelvin temperatures, showing a mobility of up to 6300 cm(2) V-1 s(-1) and quantum Hall oscillations are observed above 4 T. These results demonstrate the high quality of the transport properties despite their rough dendritic edges.