Physicists at the University of Cologne have found direct spectroscopic evidence for topological superconductivity in topological insulator Josephson junctions. This research supports the Fu-Kane theoretical model and offers a way to achieve topological superconductivity and Majorana zero modes without relying on destructive magnetic fields. The study used tunneling spectroscopy to observe phase-controlled energy gap closing and reopening, a key signature of topological superconductivity.
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