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Tunneling spectroscopy of topological insulator Josephson junctions.
Science Advances · · Journal Article · Open access
Schluck, Nikodem + more
Abstract ↗AI summary
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Highly transmissive Andreev modes in a 3D topological insulator Josephson junction show gap closing and reopening versus superconducting phase difference φ, within experimental resolution.
- Why it matters: The work tests the Fu–Kane idea that proximity-induced topological superconductivity in the topological surface state yields distinctive Andreev physics tied to spin-momentum locking.
- What they did: The authors probed a TI Josephson junction using tunnel contacts while controlling φ with a flux loop, and varied chemical potential to check whether the effect persists across conditions.
- The result: They observe behavior consistent with gap closing and reopening for a wide range of chemical potentials, and under magnetic field they find locally enhanced transmissive modes matching predictions for Josephson vortices in the TSS.
The findingWhy it mattersWhat they didThe result
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