TY - JOUR
T1 - Inter-grain Josephson currents in two-gap superconductors
AU - Ota, Yukihiro
AU - Machida, Masahiko
AU - Koyama, Tomio
N1 - Funding Information:
The work was partially supported by Grant-in-Aid for Scientific Research on Priority Area “Physics of new quantum phases in superclean materials” ( Grant No. 20029019 ) from the Ministry of Education, Culture, Sports, Science and Technology of Japan. M.M. is supported by JSPS Core-to-Core Program-Strategic Research Networks, “Nanoscience and Engineering in Superconductivity”.
PY - 2010/12
Y1 - 2010/12
N2 - We microscopically study inter-grain Josephson currents in iron-pnictide superconductors. The theoretical examination predicts that the inter-grain Josephson current is significantly reduced by ±s-wave symmetry as the incoherent tunneling process becomes dominant and the density of states and the gap amplitude between two bands are identical. In addition, we suggest important points to improve the inter-grain critical current density.
AB - We microscopically study inter-grain Josephson currents in iron-pnictide superconductors. The theoretical examination predicts that the inter-grain Josephson current is significantly reduced by ±s-wave symmetry as the incoherent tunneling process becomes dominant and the density of states and the gap amplitude between two bands are identical. In addition, we suggest important points to improve the inter-grain critical current density.
KW - Inter-grain critical current
KW - Iron-pnictide superconductors
KW - Josephson junctions
KW - Multi-band superconductors
KW - ±s-Wave symmetry
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U2 - 10.1016/j.physc.2009.11.016
DO - 10.1016/j.physc.2009.11.016
M3 - Article
AN - SCOPUS:78649693147
VL - 470
SP - S489-S490
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - SUPPL.1
ER -