• 文献标题:   Quantum transport in CVD graphene synthesized with liquid carbon precursor
  • 文献类型:   Article
  • 作  者:   YI X, SONG QY, CHEN Q, ZHAO CW, WATANABE K, TANIGUCHI T, CHEN Q, YAN CY, WANG S
  • 作者关键词:   cvd graphene, dry transfer, quantum hall effect, shubnikovde haas oscillation
  • 出版物名称:   NANOTECHNOLOGY
  • ISSN:   0957-4484 EI 1361-6528
  • 通讯作者地址:  
  • 被引频次:   1
  • DOI:   10.1088/1361-6528/ac72b1
  • 出版年:   2022

▎ 摘  要

Large-area high-quality graphene enabled by chemical vapor deposition (CVD) can possibly pave the path for advanced flexible electronics and spintronics. CVD-grown method utilizing liquid carbon precursor has recently been demonstrated as an appealing choice for mass graphene production, thanks to its low cost and safe operation. However, the quality of the graphene film has been the major obstacle for the implementation of the liquid-precursor-based CVD method. Here we report the growth of centimeter-scale easily-transferable single-layer graphene (SLG) using acetone as a liquid carbon precursor. The dry-transfer technique was used to prepare the graphene device. The typical mobility of the dry-transferred SLG device is as high as 12 500 cm(2) V-1 s(-1) at room temperature. Thanks to the high quality of the device, the robust quantum Hall effect can survive up to room temperature. The excellent device quality also enables us to observe the Shubnikov-de Haas oscillation in the low magnetic field regime and systemically study the leading scattering mechanism. We extracted both the transport scattering time tau (t) and the quantum scattering time tau ( q ) over a wide range of carrier density. The ratio of the scattering times suggests that the charged-impurity resided near the surface of the graphene restricted the device performance.