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Supercurrent in nanowires

October 15, 2013

This graph shows the flow of electrical current without developing a voltage (supercurrent) through a semiconductor coupled to two superconductors. The size of the maximum supercurrent (called critical current) can be controlled by a voltage on a nearby electrode (gate).

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Seeing this effect is important for building up to Majorana fermion experiments. It has been reported first in this paper from 2005. So we are steadily catching up with state-of-the-art (Coulomb blockade from a couple of posts ago was first demonstrated in the 1980-ies).

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