| Autor: |
Jae-Keun Kim, Kun-Rok Jeon, Pranava K. Sivakumar, Jaechun Jeon, Chris Koerner, Georg Woltersdorf, Stuart S. P. Parkin |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
Nature Communications, Vol 15, Iss 1, Pp 1-8 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2041-1723 |
| DOI: |
10.1038/s41467-024-45298-9 |
| Popis: |
Abstract Non-reciprocal electronic transport in a spatially homogeneous system arises from the simultaneous breaking of inversion and time-reversal symmetries. Superconducting and Josephson diodes, a key ingredient for future non-dissipative quantum devices, have recently been realized. Only a few examples of a vertical superconducting diode effect have been reported and its mechanism, especially whether intrinsic or extrinsic, remains elusive. Here we demonstrate a substantial supercurrent non-reciprocity in a van der Waals vertical Josephson junction formed with a T d-WTe2 barrier and NbSe2 electrodes that clearly reflects the intrinsic crystal structure of T d-WTe2. The Josephson diode efficiency increases with the T d-WTe2 thickness up to critical thickness, and all junctions, irrespective of the barrier thickness, reveal magneto-chiral characteristics with respect to a mirror plane of T d-WTe2. Our results, together with the twist-angle-tuned magneto-chirality of a T d-WTe2 double-barrier junction, show that two-dimensional materials promise vertical Josephson diodes with high efficiency and tunability. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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