Interfering Josephson diode effect in Ta2Pd3Te5 asymmetric edge interferometer

Yupeng Li; Dayu Yan; Yu Hong; Haohao Sheng; Anqi Wang; Ziwei Dou; Xingchen Guo; Xiaofan Shi; Zikang Su; Zhaozheng Lyu; Tian Qian; Guangtong Liu; Fanming Qu; Kun Jiang; Zhijun Wang; Youguo Shi; Zhu-An Xu; Jiangping Hu; Li Lu; Jie Shen

doi:10.1038/s41467-024-53383-2

Interfering Josephson diode effect in Ta₂Pd₃Te₅ asymmetric edge interferometer

Nat Commun. 2024 Oct 19;15(1):9031. doi: 10.1038/s41467-024-53383-2.

Authors

Yupeng Li^#¹, Dayu Yan^#¹, Yu Hong^{1

2}, Haohao Sheng^{1

2}, Anqi Wang^{1

2}, Ziwei Dou¹, Xingchen Guo^{1

2}, Xiaofan Shi^{1

2}, Zikang Su^{1

2}, Zhaozheng Lyu¹, Tian Qian^{1

3}, Guangtong Liu^{1

3}, Fanming Qu^{1

2

3}, Kun Jiang¹, Zhijun Wang^{1

2}, Youguo Shi^{4

5}, Zhu-An Xu^{6

7

8}, Jiangping Hu^{1

9}, Li Lu^{10

11

12}, Jie Shen^{13

14

15}

Affiliations

¹ Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China.
² School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China.
³ Songshan Lake Materials Laboratory, Dongguan, China.
⁴ Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China. [email protected].
⁵ Songshan Lake Materials Laboratory, Dongguan, China. [email protected].
⁶ School of Physics, Zhejiang University, Hangzhou, China.
⁷ State Key Laboratory of Silicon and Advanced Semiconductor Materials, Zhejiang University, Hangzhou, China.
⁸ Hefei National Laboratory, Hefei, China.
⁹ Kavli Institute of Theoretical Sciences, University of Chinese Academy of Sciences, Beijing, China.
¹⁰ Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China. [email protected].
¹¹ School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, China. [email protected].
¹² Songshan Lake Materials Laboratory, Dongguan, China. [email protected].
¹³ Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China. [email protected].
¹⁴ Songshan Lake Materials Laboratory, Dongguan, China. [email protected].
¹⁵ Beijing Academy of Quantum Information Sciences, Beijing, China. [email protected].

^# Contributed equally.

PMID: 39424819
DOI: 10.1038/s41467-024-53383-2

Abstract

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.

Grants and funding

92065203/National Natural Science Foundation of China (National Science Foundation of China)