Edge states in topological systems have attracted great interest due to their robustness and linear dispersions. Here a superconducting-proximitized edge interferometer is engineered on a topological insulator Ta2Pd3Te5 with asymmetric edges to realize the interfering Josephson diode effect (JDE), which hosts many advantages, such as the high efficiency as much as 73% at tiny applied magnetic fields with an ultra-low switching power around picowatt. As an important element to induce such JDE, the second-order harmonic in the current-phase relation is also experimentally confirmed by half-integer Shapiro steps. The interfering JDE is also accompanied by the antisymmetric second harmonic transport, which indicates the corresponding asymmetry in the interferometer, as well as the polarity of JDE. This edge interferometer offers an effective method to enhance the performance of JDE, and boosts great potential applications for future superconducting quantum devices.
@article{arxiv.2306.08478,
title = {Interfering Josephson diode effect in Ta2Pd3Te5 asymmetric edge interferometer},
author = {Yupeng Li and Dayu Yan and Yu Hong and Haohao Sheng and Anqi Wang and Ziwei Dou and Xingchen Guo and Xiaofan Shi and Zikang Su and Zhaozheng Lyu and Tian Qian and Guangtong Liu and Fanming Qu and Kun Jiang and Zhijun Wang and Youguo Shi and Zhu-An Xu and Jiangping Hu and Li Lu and Jie Shen},
journal= {arXiv preprint arXiv:2306.08478},
year = {2024}
}