What question did this study set out to answer?

This research aims to explore the Josephson diode effect in topological insulator-based junctions and understand the underlying mechanisms.

February 5, 2026Open Access

Superconducting diode effect in selectively grown topological insulator based Josephson junctions

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Investigating the Josephson diode effect in topological insulators, revealing potential control mechanisms.

This research aims to explore the Josephson diode effect in topological insulator-based junctions and understand the underlying mechanisms.
Studied Nb/Bi0.8Sb1.2Te3/Nb Josephson weak-link junctions.
Applied an in-plane magnetic field perpendicular to the current direction.
Analyzed the current-phase relationship and efficiency of the diode effect.
Observed a pronounced Josephson diode effect with efficiencies up to 7%.
Identified a nonsinusoidal current-phase relationship and anomalous phase shift.
Attributed findings to the ballistic supercurrent component from surface states.

Behner et al. (2026) studied this question.

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