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Interfering Josephson diode effect in Ta2Pd3Te5 asymmetric edge interferometer

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arxiv 2306.08478 v3 pith:X4VBD64G submitted 2023-06-14 cond-mat.mes-hall

Yupeng Li , Dayu Yan , Yu Hong , Haohao Sheng , Anqi Wang , Ziwei Dou , Xingchen Guo , Xiaofan Shi
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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
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classification cond-mat.mes-hall
keywords edgeinterferometerinterferingasymmetricdiodeeffectgreatharmonic
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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.

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  1. Unusual Electron-Phonon Interactions in Highly Anisotropic Two-Dimensional $Ta_2$$Ni_3$$Te_5$

    cond-mat.mtrl-sci 2025-06 conditional novelty 5.0 of 10

    Angle-resolved Raman spectroscopy and density functional perturbation theory trace unusual four-fold Ag-mode polarization patterns in Ta2Ni3Te5 to anisotropic electron-phonon interactions.

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