Observation of anomalous Josephson effect in nonequilibrium Andreev interferometers

Article

关键词: SUPERCURRENT;    JUNCTIONS;    METAL;   

DOI  :  10.1103/PhysRevB.107.L100502

来源: SCIE

【 摘 要 】

The evidence of anomalous Josephson effect in superconducting-normal-superconducting (SNS) junctions requiring neither Zeeman splitting nor spin-orbit coupling is reported. We demonstrate that a spontaneous phase emerges by modifying the nonequilibrium conditions of the weak link resembling f0-junctions. The voltage-controlled phase shift is detected from magnetoresistance measurements of the proximitized wire connected to the weak link forming a crosslike Andreev interferometer. The interplay of Aharanov-Bohm-like and conventional Josephson currents, in agreement with recent predictions, provides the ingredients for the anomalous current-phase relation. These results represent a breakthrough for engineering superconducting nanocircuits with voltage-tunable quantum properties.

【 授权许可】

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