• 文献标题:   Josephson Current in a Gapped Graphene Superconductor/Barrier/Superconductor Junction: Case of Massive Electrons
  • 文献类型:   Article
  • 作  者:   SUWANNASIT T, TANG IM, HOONSAWAT R, SOODCHOMSHOM B
  • 作者关键词:   gapped graphene, massive dirac fermion, josephson effect, s/i/s junction
  • 出版物名称:   JOURNAL OF LOW TEMPERATURE PHYSICS
  • ISSN:   0022-2291
  • 通讯作者地址:   Minist Educ
  • 被引频次:   5
  • DOI:   10.1007/s10909-011-0380-y
  • 出版年:   2011

▎ 摘  要

The Josephson effect in a gapped graphene-based superconductor/barrier/superconductor junction is studied. The superconductivity in gapped graphene may be achieved by depositing conventional superconductor on the top of the gapped graphene such as graphene grown on SiC substrate. In gapped graphene system, the carriers exhibit massive Dirac fermions. We focus on the effect of pseudo-Dirac-like mass on the supercurrent. In contrast to that in the gapless graphene superconductor/barrier/superconductor junction, we find that the supercurrent exhibits dependency of the Fermi energy. Also, the massive supercurrent anomalously oscillates as a function of the gate potential. This novel behavior is due to the effect of electrons acquiring mass in gapped graphene.