JOSEPHSON CURRENTS THROUGH JUNCTIONS WITH NORMAL METAL BARRIERS
JOSEPHSON CURRENTS THROUGH JUNCTIONS WITH NORMAL METAL BARRIERS
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DOI：
10.1143/ptp.44.1525
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发表时间：
1970-01-01
影响因子：
--
通讯作者：
ISHII, C
中科院分区：
文献类型：
--
作者：
ISHII, C
在厚势垒极限（100/2d 101）在低温（T <$Tc）的SNS接触结模拟的逐步一维非对角势，与不同的宏观相的超导体，包括结。在充分考虑超导体-正常金属界面处的边界散射效应的基础上，构造了单粒子绿色函数，并将其用于零电压势垒超电流的计算。超导电流是超导体之间的相对相位的分段线性周期函数，其振幅与正常势垒的厚度（2d）成反比。利用SNS结势垒超流的几何结构与SIS结势垒超流的几何结构的相似性，求出了相应的相位耦合能。
The SNS-contact junction in the thick-barrier limit (ξ0/2d≪1) at low temperature (T≪Tc) is simulated by a step-wise one-dimensional off-diagonal potential, with different macroscopic phases for each of the superconductors, comprising the junction. The one-particle Green's functions are constructed by taking into account the boundary scattering effects at the superconductor-normal metal interfaces completely, and are used to calculate the zero-voltage barrier supercurrent. The supercurrent is shown to be a sectionally linear periodic function of relative phase between the superconductors, the amplitude of which is inversely proportional to the thickness (2d) of the normal barrier. The associated phase coupling energy is conjectured by making use of the close analogy of the diagrammatical structures of the barrier supercurrents of SNS junction to that of SIS junction.