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説明:

Nonreciprocal transport refers to charge transfer processes that are sensitive to the bias polarity. Until re- cently, nonreciprocal transport was studied only in dissipative systems, where the nonreciprocal quantity is the resistance. Recent experiments have, however, demonstrated nonreciprocal supercurrent leading to the observa- tion of a supercurrent diode effect in Rashba superconductors, opening the vision of dissipationless electronics. Here we report on supercurrent diode effect in NbSe2 nanowires obtained by patterning NbSe2 flakes with odd layer number. The observed rectification efficiency in NbSe2 can be as large as 50%, almost an order of magni- tude larger than the efficiency of devices based on Rashba superconductors. In agreement with recent theory for superconducting transition metal dichalcogenides, we show that the effect is driven by the out-of-plane magnetic field component. Remarkably, we find that the effect becomes field-asymmetric in the presence of an additional in-plane field component transverse to the current direction. Supercurrent anisotropy offers a further degree of freedom in designing superconducting power electronics with the high degree of integrability offered by van der Waals materials.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Nonreciprocal transport, supercurrent diode, NbSe2

刊行年月日: 2022-07-23

出版者: Springer Science and Business Media LLC

掲載誌:

• Nature Communications (ISSN: 20411723) vol. 13 issue. 1 4266

研究助成金:

• Deutsche Forschungsgemeinschaft 314695032
• EC | Horizon 2020 Framework Programme 862660

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1038/s41467-022-31954-5

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更新時刻: 2025-02-27 08:30:52 +0900

MDRでの公開時刻: 2025-02-27 08:30:53 +0900