Interfering Josephson diode effect in Ta2Pd3Te5 asymmetric edge interferometer

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 Ta 2 Pd 3 Te 5 with asymmetric edges to realize the interfering Josephson diode effect (JD...

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Bibliographic Details
Published in:Nature communications 2024-10, Vol.15 (1), p.9031-9, Article 9031
Main Authors: Li, Yupeng, Yan, Dayu, Hong, Yu, Sheng, Haohao, Wang, Anqi, Dou, Ziwei, Guo, Xingchen, Shi, Xiaofan, Su, Zikang, Lyu, Zhaozheng, Qian, Tian, Liu, Guangtong, Qu, Fanming, Jiang, Kun, Wang, Zhijun, Shi, Youguo, Xu, Zhu-An, Hu, Jiangping, Lu, Li, Shen, Jie
Format: Article
Language:English
Subjects:
639/766/1130/1064
639/766/119/1003
639/766/119/2792/4128
639/766/25
639/766/483/3925
Asymmetry
Humanities and Social Sciences
Interferometers
Magnetic fields
multidisciplinary
Science
Science (multidisciplinary)
Superconductivity
Topological insulators
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Summary: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 Ta 2 Pd 3 Te 5 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. Applications of edge states are rare. Here the authors utilize asymmetric edge states in the topological material Ta 2 Pd 3 Te 5 to achieve the interfering Josephson diode effect, exhibiting high efficiency with ultra-low switching power at very small magnetic fields.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-024-53383-2