• 文献标题:   Zero-bias conductance peak and Josephson effect in graphene-NbTiN junctions
  • 文献类型:   Article
  • 作  者:   POPINCIUC M, CALADO VE, LIU XL, AKHMEROV AR, KLAPWIJK TM, VANDERSYPEN LMK
  • 作者关键词:  
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   2469-9950 EI 2469-9969
  • 通讯作者地址:   Delft Univ Technol
  • 被引频次:   30
  • DOI:   10.1103/PhysRevB.85.205404
  • 出版年:   2012

▎ 摘  要

We report electronic transport measurements of graphene contacted by NbTiN electrodes, which at low temperature remain superconducting up to at least 11 T. In devices with a single superconducting contact, we find a more than twofold enhancement of the conductance at zero bias, which we interpret in terms of reflectionless tunneling. In devices with two superconducting contacts, we observe the Josephson effect, bipolar supercurrents, and Fraunhofer patterns.