Direct probe of superconductivity on atomic scale

Scientific Achievement: Non-contact Andreev reflection enables quantitative detection of Cooper pair injection from a metal to a superconductor across a sub-nanometer-scale tunneling gap.

Significance and Impact: Quantitative imaging of superconducting properties, including the potential to directly measure pairing symmetry, is a crucial enabling step for topologically protected quantum computing.

DOI: 10.1021/acs.nanolett.2c00697

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