Perfect supercurrent diode efficiency in chiral nanotube based weak links
Abstract
The supercurrent diode effect (SDE) describes superconducting systems where the magnitude of the superconducting-to-normal state switching current differs for positive and negative current bias. Despite the ubiquity of such diode effects in Josephson devices, the fundamental conditions to observe a diode effect in a Josephson junction and achieve perfect diode efficiency remain unclear. In this work, we theoretically analyze the supercurrent diode properties of a chiral nanotube-based weak link. We show a perfect diode effect and anomalous phase can develop across the junction when a magnetic field is applied parallel to the tube despite the absence of spin-orbit interactions in the system. We show the SDE in the junction is independent of the anomalous phase. We determine a persistent current along the nanotube associated with the Little-Parks effect can activate SDE, even in the absence of higher-order pair tunneling processes. We show this type of SDE can lead to, in principle, a perfect diode efficiency, highlighting how persistent currents can be used to engineer high efficiency supercurrent diodes.
Related
- High-Efficiency and Large Supercurrent Rectification with Superconducting Coil
- Supercurrent as a bulk probe for topological phase
- One-loop mixing matrix of the N=1 SYM Supercurrent operator upon renormalization on the Lattice using stout-smeared Links
- Supercurrent enhancement in Bloch domain walls
- Strain-engineered long-distance supercurrent in an altermagnetic CrSb based-Josephson junction
BibTeX
@article{cuozzo2026perfect,
title = {{Perfect supercurrent diode efficiency in chiral nanotube based weak links}},
author = {Joseph J. Cuozzo and François Léonard},
journal = {Communications Physics},
year = {2026},
month = oct,
doi = {10.1038/s42005-026-02925-9},
url = {https://www.nature.com/articles/s42005-026-02925-9},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Perfect supercurrent diode efficiency in chiral nanotube based weak links
AU - Joseph J. Cuozzo
AU - François Léonard
PY - 2026
DA - 2026/10/22
JO - Communications Physics
DO - 10.1038/s42005-026-02925-9
UR - https://www.nature.com/articles/s42005-026-02925-9
AB - The supercurrent diode effect (SDE) describes superconducting systems where the magnitude of the superconducting-to-normal state switching current differs for positive and negative current bias. Despite the ubiquity of such diode effects in Josephson devices, the fundamental conditions to observe a diode effect in a Josephson junction and achieve perfect diode efficiency remain unclear. In this work, we theoretically analyze the supercurrent diode properties of a chiral nanotube-based weak link. We show a perfect diode effect and anomalous phase can develop across the junction when a magnetic field is applied parallel to the tube despite the absence of spin-orbit interactions in the system. We show the SDE in the junction is independent of the anomalous phase. We determine a persistent current along the nanotube associated with the Little-Parks effect can activate SDE, even in the absence of higher-order pair tunneling processes. We show this type of SDE can lead to, in principle, a perfect diode efficiency, highlighting how persistent currents can be used to engineer high efficiency supercurrent diodes.
SN - 2399-3650
ER -