KTaO3-Based Supercurrent Diode
Fuente:
arXiv
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| Autori principali: | , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866915603877462016 |
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| author | Yu, Muqing Kim, Jieun Omran, Ahmed Li, Zhuan Yang, Jiangfeng Biswas, Sayanwita Eom, Chang-Beom Pekker, David Irvin, Patrick Levy, Jeremy |
| author_facet | Yu, Muqing Kim, Jieun Omran, Ahmed Li, Zhuan Yang, Jiangfeng Biswas, Sayanwita Eom, Chang-Beom Pekker, David Irvin, Patrick Levy, Jeremy |
| contents | The supercurrent diode effect (SDE), characterized by nonreciprocal critical currents, represents a promising building block for future dissipationless electronics and quantum circuits. Realizing SDE requires breaking both time-reversal and inversion symmetry in the device. Here we use conductive atomic force microscopy (c-AFM) lithography to pattern reconfigurable superconducting weak links (WLs) at the LaAlO3/KTaO3 (LAO/KTO) interface. By deliberately engineering the WL geometry at the nanoscale, we realize SDE in these devices in the presence of modest out-of-plane magnetic fields. The SDE polarity can be reversed by simply changing the WL position, and the rectification efficiency reaches up to 13% under optimal magnetic field conditions. Time-dependent Ginzburg-Landau simulations reveal that the observed SDE originates from asymmetric vortex motion in the inversion-symmetry-breaking device geometry. This demonstration of SDE in the LAO/KTO system establishes a versatile platform for investigating and engineering vortex dynamics, forming the basis for engineered quantum circuit elements. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_04618 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | KTaO3-Based Supercurrent Diode Yu, Muqing Kim, Jieun Omran, Ahmed Li, Zhuan Yang, Jiangfeng Biswas, Sayanwita Eom, Chang-Beom Pekker, David Irvin, Patrick Levy, Jeremy Superconductivity The supercurrent diode effect (SDE), characterized by nonreciprocal critical currents, represents a promising building block for future dissipationless electronics and quantum circuits. Realizing SDE requires breaking both time-reversal and inversion symmetry in the device. Here we use conductive atomic force microscopy (c-AFM) lithography to pattern reconfigurable superconducting weak links (WLs) at the LaAlO3/KTaO3 (LAO/KTO) interface. By deliberately engineering the WL geometry at the nanoscale, we realize SDE in these devices in the presence of modest out-of-plane magnetic fields. The SDE polarity can be reversed by simply changing the WL position, and the rectification efficiency reaches up to 13% under optimal magnetic field conditions. Time-dependent Ginzburg-Landau simulations reveal that the observed SDE originates from asymmetric vortex motion in the inversion-symmetry-breaking device geometry. This demonstration of SDE in the LAO/KTO system establishes a versatile platform for investigating and engineering vortex dynamics, forming the basis for engineered quantum circuit elements. |
| title | KTaO3-Based Supercurrent Diode |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2511.04618 |