Bauriedl, Lorenz and Bäuml, Christian and Fuchs, Lorenz and Baumgartner, Christian and Paulik, Nicolas and Bauer, Jonas M. and Lin, Kai-Qiang and Lupton, John M. and Taniguchi, Takashi and Watanabe, Kenji and Strunk, Christoph and Paradiso, Nicola (2022) Supercurrent diode effect and magnetochiral anisotropy in few-layer NbSe2. NATURE COMMUNICATIONS, 13 (1): 4266. ISSN 2041-1723
Full text not available from this repository. (Request a copy)Abstract
The supercurrent diode effect was recently observed in a Nb/V/Ta superlattice thin film with Rashba-type spin-orbit coupling. Here, the authors observe this effect in few-layer NbSe2 crystals driven by valley-Zeeman-type spin-orbit coupling and find that the effect is proportional to out-of-plane magnetic field. Nonreciprocal transport refers to charge transfer processes that are sensitive to the bias polarity. Until recently, 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 observation of a supercurrent diode effect in Rashba superconductors. Here we report on a supercurrent diode effect in NbSe2 constrictions obtained by patterning NbSe2 flakes with both even and odd layer number. The observed rectification is a consequence of the valley-Zeeman spin-orbit interaction. We demonstrate a rectification efficiency as large as 60%, considerably 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 component of the magnetic field. 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 diodes offer a further degree of freedom in designing superconducting quantum electronics with the high degree of integrability offered by van der Waals materials.
| Item Type: | Article |
|---|---|
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group John Lupton Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Christoph Strunk |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 07 Feb 2024 09:34 |
| Last Modified: | 07 Feb 2024 09:34 |
| URI: | https://pred.uni-regensburg.de/id/eprint/56985 |
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