Key Highlights
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A new study suggests the “missing” first Shapiro step in Josephson junctions, often seen as a sign of exotic Majorana particles, can be explained by the normal, inherent non-linearity of the junction’s electrical behavior. This finding is significant because it offers a simpler, alternative explanation for a phenomenon that was thought to be a unique fingerprint of elusive quantum states, potentially changing how such experiments are interpreted.
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Researchers conducted measurements on aluminum/tungsten ditelluride (Al/WTe2) junctions, which have low-to-moderate transparency, to demonstrate this effect. This work is important as it highlights that the specific material properties and quality of a junction must be carefully considered before concluding the presence of more exotic physics like Majorana bound states.
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