Triplet p-wave superconductivity with ABM state in epitaxial Bi/Ni bilayers

24 Oct 2018 · Zhao G. J., Gong X. X., He J. C., Gifford J. A., Zhou H. X., Chen Y., Jin X. F., Chien C. L., Chen T. Y. ·

We report observation of spin triplet superconductivity in epitaxial Bi/Ni bilayers with TC up to 4 K and 2Delta/kBTC = 12. Andreev reflection spectroscopy (ARS) with ballistic injection of unpolarized and spin-polarized electrons conclusively reveals spin triplet p-wave superconductivity. The gap structure measured by ARS in multiple crystal directions shows the ABM (Anderson-Brinkman-Morel) state, the same as that in superfluid 3He.

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Triplet p-wave superconductivity with ABM state in epitaxial Bi/Ni bilayers

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