• 文献标题:   Gapped graphene-based Josephson junction with d-wave pair coupling
  • 文献类型:   Article
  • 作  者:   GOUDARZI H, KHEZERLOU M, DEZHALOUD T
  • 作者关键词:   josephson current, dwave superconductor, gapped graphene, andreev bound state
  • 出版物名称:   PHYSICA CSUPERCONDUCTIVITY ITS APPLICATIONS
  • ISSN:   0921-4534
  • 通讯作者地址:   Urmia Univ
  • 被引频次:   3
  • DOI:   10.1016/j.physc.2013.03.004
  • 出版年:   2013

▎ 摘  要

The Josephson current passing through a S/I/S gapped graphene-based junction, where superconductivity in the S region is induced by depositing unconventional d-wave superconductor is investigated. The energy levels of massive Dirac fermions are exactly found for Andreev bound states. We illustrate the effect of characteristic of d-wave pairing symmetry on the Andreev bound states and the Josephson current. It is shown that the Josephson current vanishes for special range of superconductivity phase, phi = phi(1) - phi(2) and the position of the maximum current depends on the mass gap of graphene. The critical supercurrent varies in an oscillatory manner as function of the barrier strength, so that the period of oscillations does not change by increasing the effective mass of quasiparticles. (c) 2013 Elsevier B.V. All rights reserved.