Zeeman effects on Josephson current in d-wave superconductor/d-wave superconductor junctions |
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| Authors: | Liao Yan-Hu Dong Zheng-Chao Yin Zai-Feng Fu Hao |
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| Affiliation: | Department of Physics, Huaiyin Teachers Collegeand Jiangsu Province Key Laboratory for Chemistry of Low-Dimensional Materials, Huaian 223001, China; Department of Physics, Huaiyin Teachers Collegeand Jiangsu Province Key Laboratory for Chemistry of Low-Dimensional Materials, Huaian 223001, China;Department of Physics, College of Science, YanbianUniversity, Yanji 133002, China |
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| Abstract: | This paper solves a self-consistent equation for the d-wavesuperconducting gap and the effective exchange field in themean-field approximation, and studies the Zeeman effects on thed-wave superconducting gap and thermodynamic potential. The Josephsoncurrents in the d-wave superconductor(S)/insulating layer(I)/d-wave Sjunctions are calculated as a function of the temperature, exchangefield, and insulating barrier strength under a Zeeman magnetic fieldon the two d-wave Ss. It is found that the Josephson criticalcurrents in d-wave S/d-wave S junction to a great extent depend onthe relative orientation of the effective exchange field of the two Selectrodes, and the crystal orientation of the d-wave S. The exchangefield under certain conditions can enhance the Josephson criticalcurrent in a d-wave S/I/d-wave S junction. |
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| Keywords: | Zeeman effect d-wave S/d-waveS ferromagnetic d-wave superconductor Josephson current |
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