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Effect of transparency on Josephson junction between s+g-wave superconductors |
| Gholamreza Rashedi† |
| Department of Physics, University of Isfahan, Isfahan, Iran |
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Abstract In this paper, a dc Josephson junction between borocarbide superconductors has been studied theoretically. The s+g-wave pairing symmetry which is observed in rare earth complex of borocarbides has a huge anisotropy and is an interesting form of unconventional superconductivity. We calculate the Josephson current in a superconductor–insulator–superconductor (SIS) Josephson junction with s+g-wave superconducting pairing symmetry. In our planar junction c-axis is parallel to an interface with finite transparency but ab-planes of two tetragonal superconductors are misorientated by angle $\alpha$. We obtain that the Josephson current is strongly dependent on mis-orientation between the left and the right ab-planes. An insulator sandwiched between two superconductors which acts as a potential barrier is demonstrated by a transparency coefficient. The effects of the potential barrier and the mis-orientation on the current are studied analytically and numerically. Occurrence of 0–$\pi$ transition in this s+g-wave junction is investigated in this paper. A comparison between d-wave Josephson junction and s+g-wave one is also made in the present paper.
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Received: 18 April 2010
Revised: 25 April 2010
Accepted manuscript online:
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PACS:
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74.20.-z
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(Theories and models of superconducting state)
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74.25.Jb
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(Electronic structure (photoemission, etc.))
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74.50.+r
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(Tunneling phenomena; Josephson effects)
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74.72.-h
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(Cuprate superconductors)
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78.20.Ci
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(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
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Cite this article:
Gholamreza Rashedi Effect of transparency on Josephson junction between s+g-wave superconductors 2010 Chin. Phys. B 19 107303
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