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势垒散射对双层d波超导结直流Josephson电流的影响

Barrier interface scattering effect on DC Josephson current in d-wave superconductor/d-wave superconductor junctions
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摘要 在d波超导体/绝缘层/d波超导体(dS/I/dS)中,考虑到结界面势垒散射,运用Bogoliubov-de Gennes(BdG)方程和推广的Furusaki-Tsukada(FT)电流公式,计算了超导结中准粒子的传输系数和直流Josephson电流.研究结果表明:dS/I/dS结中的Josephson电流随着温度的变化曲线强烈依赖于d波超导体的晶轴方位,并且结界面处的势垒散射始终对Andreev反射有抑制作用. The d.c.Josephson effect has been studied by taking into account the barrier interface scattering effect in a d-wave superconductor/insulator/d-wave superconductor junctions.We calculate the d.c.Josephson current based on the Bogoliubov de Gennes(BdG) equation and Furusaki-Tsukada(FT) formula.It is found that the d.c.Josephson current depends strongly on the crystalline axis orientation of d-wave superconductor in d-wave superconductor /insulator/d-wave superconductor junctions,the barrier strength at interface always suppress the Andreev reflection.
作者 金霞 廖艳华
出处 《苏州大学学报(自然科学版)》 CAS 2012年第4期58-62,共5页 Journal of Soochow University(Natural Science Edition)
关键词 dS/I/dS结 d波超导体 Josephson电流 d-wave superconductor/insulator/d-wave superconductor junctions d-wave superconductor Josephson current
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参考文献11

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