In situ tunable superconducting diode enabling field free operation with infinite nonreciprocity
Abstract
Efficient, scalable, and magnetic-field-free superconducting diodes are essential for future superconducting electronics; yet, despite significant efforts, such practical devices remain unrealized. The main challenge lies in achieving broad-range in-situ tunability, both for optimization and for achieving transistor-like operation. Here, we study diodes based on four-terminal niobium planar Josephson junctions. We show that the multiterminal structure eliminates the need for an external magnetic field and enables essentially unrestricted in-situ tunability, along with reconfigurability of the diode polarity, leading to advanced functionality. For example, we demonstrate that such diodes can operate as Gauss neurons via reentrant superconductivity. By deliberately tuning the junction parameters, we obtain effectively infinite nonreciprocity (within experimental resolution) leading to threshold-free ac-current rectification. Such technologically simple, reconfigurable, and broadly tunable diodes could be instrumental for future digital and neuromorphic computing.
Versions
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BibTeX
@article{hovhannisyan2026situ,
title = {{In situ tunable superconducting diode enabling field free operation with infinite nonreciprocity}},
author = {Razmik A. Hovhannisyan and Taras Golod and Amirreza Lotfian and Vladimir M. Krasnov},
journal = {Communications Physics},
year = {2026},
month = oct,
doi = {10.1038/s42005-026-02904-0},
url = {https://www.nature.com/articles/s42005-026-02904-0},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - In situ tunable superconducting diode enabling field free operation with infinite nonreciprocity
AU - Razmik A. Hovhannisyan
AU - Taras Golod
AU - Amirreza Lotfian
AU - Vladimir M. Krasnov
PY - 2026
DA - 2026/10/01
JO - Communications Physics
DO - 10.1038/s42005-026-02904-0
UR - https://www.nature.com/articles/s42005-026-02904-0
AB - Efficient, scalable, and magnetic-field-free superconducting diodes are essential for future superconducting electronics; yet, despite significant efforts, such practical devices remain unrealized. The main challenge lies in achieving broad-range in-situ tunability, both for optimization and for achieving transistor-like operation. Here, we study diodes based on four-terminal niobium planar Josephson junctions. We show that the multiterminal structure eliminates the need for an external magnetic field and enables essentially unrestricted in-situ tunability, along with reconfigurability of the diode polarity, leading to advanced functionality. For example, we demonstrate that such diodes can operate as Gauss neurons via reentrant superconductivity. By deliberately tuning the junction parameters, we obtain effectively infinite nonreciprocity (within experimental resolution) leading to threshold-free ac-current rectification. Such technologically simple, reconfigurable, and broadly tunable diodes could be instrumental for future digital and neuromorphic computing.
SN - 2399-3650
ER -