TY - JOUR
T1 - Effects of interface roughness on d-wave Josephson junctions
AU - Shirai, S.
AU - Tsuchiura, H.
AU - Tanaka, Y.
AU - Inoue, J. I.
AU - Kashiwaya, S.
N1 - Funding Information:
The authors wish to thank I. Iguchi and H. Ito for their useful discussions. This work is supported in part by a Grant-in-Aid for Creative Basic Research (08NP1201) of the Ministry from Education, Science, Sports and Culture. Numerical computation in this work was partially carried out at the Yukawa Institute Computer Facility, and the Supercomputer Center, Institute for Solid State Physics, University of Tokyo.
PY - 2001/9
Y1 - 2001/9
N2 - The Josephson current-phase relations in d-wave/d-wave superconductor junctions in the tunnel limit are studied using the two-dimensional extended-Hubbard model. The order parameters are determined in a self-consistent way within the Bogoliubov-de Gennes theory. In this study, we calculate the case of (110) oriented junction which have the atomic scale roughness on their interfaces. In uniform junctions, the anomalous current-phase relation obtained within a quasiclassical theory is qualitatively reproduced. On the other hand, in the junctions with an interface impurity, that anomalous relation disappears.
AB - The Josephson current-phase relations in d-wave/d-wave superconductor junctions in the tunnel limit are studied using the two-dimensional extended-Hubbard model. The order parameters are determined in a self-consistent way within the Bogoliubov-de Gennes theory. In this study, we calculate the case of (110) oriented junction which have the atomic scale roughness on their interfaces. In uniform junctions, the anomalous current-phase relation obtained within a quasiclassical theory is qualitatively reproduced. On the other hand, in the junctions with an interface impurity, that anomalous relation disappears.
KW - Hubbard model
KW - Interface roughness
KW - Josephson junctions
KW - d-wave superconductor
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U2 - 10.1016/S0921-4534(01)00557-3
DO - 10.1016/S0921-4534(01)00557-3
M3 - Article
AN - SCOPUS:0035451722
VL - 357-360
SP - 1584
EP - 1587
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - SUPPL. 1
ER -