We prepare orthorhombic CoSb monolayer films on SrTiO 3 (001) substrate by molecular beam epitaxy and observe symmetric gap around the Fermi level with coherence peaks at ± (6–7) meV by in situ scanning tunneling spectroscopy. Ex situ magnetization measurements of the films protected by Te and Si films consistently reveal a diamagnetic transition at 14 K. These results suggest the occurrence of superconductivity in orthorhombic CoSb monolayers on SrTiO 3 (001).
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Ding et al. (2019) studied this question.
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