TY - JOUR
T1 - Collective modes and Josephson vortices in a heterotic Josephson junction between single- and two-gap superconductors
AU - Ota, Yukihiro
AU - Machida, Masahiko
AU - Koyama, Tomio
AU - Matsumoto, Hideki
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 construct a theory of a heterotic Josephson junction between single- and two-gap superconductors. The theory predicts the presence of in-phase and out-of-phase collective modes of superconducting phases. The former is the Josephson plasma mode, and the latter is a counterpart of Leggett's mode in Josephson junctions. A signature for ±s-wave superconductivity is a drastic reduction of the frequency of the Josephson plasma mode. We also show that the magnetic field distribution of the Josephson vortex for ±s-wave superconductivity is more enlarged than that for s-wave without sign change between the order parameters.
AB - We construct a theory of a heterotic Josephson junction between single- and two-gap superconductors. The theory predicts the presence of in-phase and out-of-phase collective modes of superconducting phases. The former is the Josephson plasma mode, and the latter is a counterpart of Leggett's mode in Josephson junctions. A signature for ±s-wave superconductivity is a drastic reduction of the frequency of the Josephson plasma mode. We also show that the magnetic field distribution of the Josephson vortex for ±s-wave superconductivity is more enlarged than that for s-wave without sign change between the order parameters.
KW - Iron-based superconductors
KW - Josephson junctions
KW - Josephson plasma mode
KW - Josephson vortex
KW - Josephson-Leggett mode
KW - Multi-band superconductors
KW - ±s-Wave symmetry
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U2 - 10.1016/j.physc.2009.10.023
DO - 10.1016/j.physc.2009.10.023
M3 - Article
AN - SCOPUS:78649701153
SN - 0921-4534
VL - 470
SP - S882-S883
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
IS - SUPPL.1
ER -