介观超导三角形的电压整流效应：实验与模拟
Voltage rectification effects in mesoscopic superconducting triangles: experiment and modelling
摘要：
研究了介观三角形中外加电流与磁场诱导的持续电流的相互作用。作为这些电流叠加的结果，观察到明显的电压整流效应。我们证明，整流信号的幅度强烈地依赖于电流引线的配置与最低的信号时，接触是沿着三角形的中位数对齐。当触点与几何中心相比偏离中心时，电压响应显示出作为所施加的场的函数的振荡，其符号可以通过移动触点来控制。这些结果与由有限个相同的约瑟夫森结组成的闭环系统的理论预测完全一致。
英文摘要：
The interaction of externally applied currents with persistent currents induced by magnetic field in a mesoscopic triangle is investigated. As a consequence of the superposition of these currents, clear voltage rectification effects are observed. We demonstrate that the amplitude of the rectified signal strongly depends on the configurations of the current leads with the lowest signal obtained when the contacts are aligned along a median of the triangle. When the contacts are aligned off-centered compared to the geometrical center, the voltage response shows oscillations as a function of the applied field, whose sign can be controlled by shifting the contacts. These results are in full agreement with theoretical predictions for an analogous system consisting of a closed loop with a finite number of identical Josephson junctions.
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