Extended Data Fig. 5: No supercurrent spin-valve effect and 0-to-π phase shift detectable in the \({\it{d}}_{\it{s}} < {\it{\xi }}_{{\it{triplet}}}^{{\it{Mn}}_3{\it{Ge}}}\) Mn3Ge JJ-based SQUID. | Nature Nanotechnology

Extended Data Fig. 5: No supercurrent spin-valve effect and 0-to-π phase shift detectable in the \({\it{d}}_{\it{s}} < {\it{\xi }}_{{\it{triplet}}}^{{\it{Mn}}_3{\it{Ge}}}\) Mn3Ge JJ-based SQUID.

From: Chiral antiferromagnetic Josephson junctions as spin-triplet supercurrent spin valves and d.c. SQUIDs

Extended Data Fig. 5: No supercurrent spin-valve effect and 0-to-π phase shift detectable in the $${\it{d}}_{\it{s}} < {\it{\xi }}_{{\it{triplet}}}^{{\it{Mn}}_3{\it{Ge}}}$$ d s < ξ t r i p l e t M n 3 G e Mn3Ge JJ-based SQUID.The alternative text for this image may have been generated using AI.

a, Typical magnetic-field interference pattern Ic(μ0H⊥) of the ds = 84 nm (<\(\xi _{triplet}^{Mn_3Ge}\) = 157–178 nm) JJ. The inset displays the magnified plot around the zero field μ0H⊥ = 0. b, Time-averaged voltage V as a function of external magnetic field μ0H⊥ for the dc current I-biased ds = 84 nm JJ, taken at 2 K. In this measurement, μ0H⊥ (≤|3 mT|) is applied perpendicular to the Kagome plane of the Mn3Ge barrier. c-e, Time-averaged voltage V as a function of perpendicular magnetic field μ0H⊥ for the I-biased SQUID, taken at T = 2 K. From the periodic \(V\left( {\mu _0H_ \bot ,\;I \ge I_c^{tot}} \right)\) modulation in c-e, we find a characteristic period of μ0Hosc ≈ 0.30 mT. None of the supercurrent spin-valve behaviour and the 0-to-π phase shift as a function of μ0H⊥ clearly emerge in the \(d_s \approx 80\;nm\;\left( { < \xi _{triplet}^{Mn_3Ge}} \right)\) Mn3Ge JJ-based SQUID, which are well consistent with our theoretical modelling [Eq. (S28)]. The error bars in a represent the standard deviation.

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