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Chin. Phys. B, 2010, Vol. 19(10): 107303    DOI: 10.1088/1674-1056/19/10/107303
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Effect of transparency on Josephson junction between s+g-wave superconductors

Gholamreza Rashedi
Department of Physics, University of Isfahan, Isfahan, Iran
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.
Keywords:  Josephson junction      unconventional superconductor      borocarbides  
Received:  18 April 2010      Revised:  25 April 2010      Accepted manuscript online: 
PACS:  74.20.-z (Theories and models of superconducting state)  
  74.25.Jb (Electronic structure (photoemission, etc.))  
  74.50.+r (Tunneling phenomena; Josephson effects)  
  74.72.-h (Cuprate superconductors)  
  78.20.Ci (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))  

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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