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

C. L. Chien; G. J. Zhao; H. X. Zhou; J. A. Gifford; J. C. He; T. Y. Chen; X. F. Jin; X. X. Gong; Y. Chen

arxiv: 1810.10403 · v1 · pith:GIQZBBHYnew · submitted 2018-10-24 · ❄️ cond-mat.supr-con

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

G. J. Zhao , X. X. Gong , J. C. He , J. A. Gifford , H. X. Zhou , Y. Chen , X. F. Jin , C. L. Chien

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T. Y. Chen

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classification ❄️ cond-mat.supr-con

keywords superconductivitytripletbilayersepitaxialp-wavespinstateanderson-brinkman-morel

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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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