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      Josephson effect in superconductive SNS heterostructures with barriers

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      Author(s)
      Cakir, O.
      Kulik, I. O.
      Date
      2003
      Source Title
      Physical Review B - Condensed Matter and Materials Physics
      Print ISSN
      0163-1829
      Publisher
      The American Physical Society
      Volume
      67
      Issue
      17
      Pages
      174514-1 - 174514-8
      Language
      English
      Type
      Article
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      Abstract
      The dc Josephson effect in a planar superconductor-normal-metal-superconductor (SNS) junction is studied in the existence of a δ barrier in the normal region. The Green function of the structure is obtained by solving the Gorkov equations for the structure and then the current is calculated from the Green functions. The effect of the strength and position of the barrier is investigated. The current shows a weak dependence on the position of the barrier and it is seen to be maximum when the barrier is at the middle of the normal region. Also it is found that the current shows a stronger dependence on the strength of the barrier at low temperatures. A comparative discussion of three possible types of Josephson junctions, the SIS, SCS, and SNS contacts, is presented.
      Keywords
      Metal
      Chemical structure
      Conductance
      Electric current
      Low temperature
      Mathematical analysis
      Permalink
      http://hdl.handle.net/11693/24496
      Published Version (Please cite this version)
      https://doi.org/10.1103/PhysRevB.67.174514
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      • Department of Physics 2484
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