论文标题
约瑟夫森在超导体正常的点 - 螺旋体连接器中驱动于准二粒注射均衡的效果
Josephson effect in superconductor-normal dot-superconductor junctions driven out of equilibrium by quasiparticle injection
论文作者
论文摘要
从理论上讲，我们通过正常点研究了超电流的较大变化，这些变化是由与DOT相关的正常铅的小型准颗粒注射电流诱导的。我们发现，超电流分解为子仪表的贡献，这取决于应用于正常导线的电压，以及间隙外部能量相反的符号的贡献，对电压不敏感。随着电压逐渐抑制子段的贡献，存在一个临界电压，在该电压之上，间隙以外的能量的贡献主导，导致符号逆转电流关系的符号，即过渡到所谓的$π$期结。我们确定临界电压并分析效果在DOT中的温度和非弹性弛豫方面的鲁棒性。
We study theoretically the large variations of the supercurrent through a normal dot that are induced by a small quasiparticle injection current from normal leads connected to the dot. We find that the supercurrent decomposes into a subgap contribution, which depends on the voltages applied to the normal leads, as well as a contribution with opposite sign from energies outside the gap, which is insensitive to the voltages. As the voltages gradually suppress the subgap contribution, a critical voltage exists above which the contribution from energies outside the gap dominates, leading to a sign reversal of the current-phase relation, namely a transition to a so-called $π$-junction behavior. We determine the critical voltage and analyze the robustness of the effect with respect to temperature and inelastic relaxation in the dot.
