论文标题
远程约瑟夫森效应由温度梯度和电路拓扑控制
Long-range Josephson effect controlled by temperature gradient and circuit topology
论文作者
论文摘要
我们证明，在暴露于温度梯度的交叉样超导式杂交纳米结构（X-杂种）中，超电流可以大大增强。在温度t超过我们X结的无能的情况下，约瑟夫森电流随着T的增加而衰减，可以通过正确选择电路拓扑来进一步增强。在温度梯度的较大值下，对超循环的非平衡贡献可能与低T下的平衡量一样大。我们还预测，由温度梯度和系统几何形状控制的0-和$π$之间的各种过渡状态。我们的预测可以在现代实验中直接验证。
We demonstrate that the supercurrent can be strongly enhanced in cross-like superconducting hybrid nanostructures (X-junctions) exposed to a temperature gradient. At temperatures T exceeding the Thouless energy of our X-junction the Josephson current decays algebraically with increasing T and can be further enhanced by a proper choice of the circuit topology. At large values of the temperature gradient the non-equilibrium contribution to the supercurrent may become as large as the equilibrium one at low T. We also predict a variety of transitions between 0- and $π$-junction states controlled by the temperature gradient as well as by the system geometry. Our predictions can be directly verified in modern experiments.
